Summarize the following court judgment. ON: Civil Appeal No. 1777 of 1973. From the Judgment and Decree dated 25.6.1973 of the Karnataka High Court in Regular First Appeal No. 56 of 1968. K.N. Bhatt	 V.K. Verma and Ms Madhu Moolchandani for the Appellants. S.S. Javali and B .R. Agarwala for the Respondents. The Judgment of the Court was delivered by 1142 KHALID	 J. This is an appeal by certificate. against the Judgment dated 25th June	 1972	 passed by a Division Bench of the Karnataka High Court. The 1st defendant Bank is the appellant. Original Suit No. 72 of 1962 was filed in the Court of Civil Judge. Mangalore	 by the Canara Sales Corporation	 Ltd. through its Managing Director	 V.S. Kudva. He died during the pendency of the suit and the suit was continued by the succeeding Managing Director of the Corporation. The suit was against two defendants: the appellant Bank was the first defendant and the second defendant was one Y.V	 Bhat who was the Chief Accounts Officer of the plaintiff	 till 1961. He died during the pendency of the appeal before the High Court and his legal representatives were brought on record. When the suit was filed	 the appellant Bank was called the Canara Bank Ltd. After the nationalisation of banks it became the Canara Bank which is the appellant before us. The suit was instituted for recovery of a sum of Rs.3	26	047.92. with the following allegations: The plain tiff is a private Limited Company with its head office at Mangalore. It had a current account with the appellant Bank in its Mangalore Bunder branch. The Managing Director of the company and the General Manager of a sister concern of the company had been authorised to operate the said current account of the plaintiff with the Bank. The second defendant was attending to the maintenance of accounts of the plain tiff and was also in charge and custody of the cheque books issued by the Bank to the plaintiff. In March	 1961	 the second defendant was absent from duty for some time. During that period one A. Shenoy	 who was the Assistant of the second defendant was directed to bring the accounts upto date. During this process	 he noticed certain irregularities in the account and brought this to the notice of the plain tiff. On verification	 it was found that cheques purporting to bear the signature of Shri V.S. Kudva were encashed though they did not bear his signature. In other words the signatures were forged. On 25 3 196 1	 a complaint was made by the plaintiff with the Superintendent of Police. The plaintiff appointed a firm of Chartered Accountants to conduct special audit of the company 's accounts	 for the years 1957:58 to 1960 61. This special audit disclosed that the second defendant had withdrawn	 in all	 a sum of Rs.3	26	047.92 under 42 cheques. The suit was filed for recovery of the amount on the plea that the amounts as per the forged cheques were not utilized for the purpose of the plaintiff	 that they were not authorised ones	 that there was no acquiescence or ratification open or tacit on the part of the plaintiff	 that the plaintiff was unaware of the 1143 fraud till the new accountant discovered it. The appellant Bank resisted the suit on the following grounds in their written statement: (i) That the cheques were not forged ones. (ii) Even if they were forged ones the plaintiff was not entitled to recover the amount on account of its own negli gence. (iii) There was settlement of accounts between the parties from time to time and as such the plaintiff was not entitled to reopen the same and claim the sums paid under the cheques in question. (iv) The suit was barred by limitation. The second defendant pleaded that the cheques were not forged ones and the amounts recovered by the cheques were utilized for the purpose of the plaintiff. The Trial Court negatived the contentions of the first defendant Bank and passed a decree for the sum claimed	 with interest at 6% from the date of the suit till recovery of the amount. In appeal before the Division Bench	 the judg ment of the Trial Court was confirmed. The High Court certified that the case involved substan tial questions of law of general public importance and granted certificate to file the appeal. It is thus that this appeal has come before us. Venkataramiah	 J. as he then was	 who spoke for the Bench	 has in his detailed Judgment considered all the aspects of the case both on facts and on law and agreed with the Trial Court that the suit had to be decreed	 repelling the contentions raised by the first defendant. The courts have concurrently found that the cheques were forged and that the second defendant was responsible for it. We do not propose to consider the question of facts in this Judgment. The learned counsel for the appellant	 Shri Bhat argued the case at length and took us through various authorities	 bearing on the question	 most of which fell for considera tion at the hands of the High Court also. In the instant case. 42 cheques with forged signature were presented on various dates between the year 1957 and 1961. During the said period the appellant Bank used to send to the plaintiff respondent 1144 pass sheets containing the debit and credit entries in the current account of the plaintiff with the Bank every month and at the end of every half year ending 30th June and 31st December	 a letter used to be sent asking the respondent to confirm that the balance in his account with the Bank was as mentioned in the letter. Till March. 1961 the correctness of the entries in the pass sheets and half yearly statements was not questioned by the plaintiff. The accounts of the plaintiff company were being audited as required by the Companies Act by Chartered Accountants. The Bank contended that if there was mis appropriation of an amount of nearly Rs.3 lacs by forged cheques by the second defendant this would have been detected by the Chartered Accountants and would have come to the notice of the plaintiff company. The several entries in the books of account maintained by the plaintiff company show that all the amounts covered by the cheques in dispute had been credited in the books. The Managing Director of the plaintiff company himself admitted that he had received the periodical statements and that he did not at any time intimate the Bank about the incorrect ness either in the pass sheets or in the letters. The inac tion on the part of the plaintiff company and its Managing Director in not informing the Bank of the irregularities in the account and deliberately withholding such information from the Bank	 according to the Bank. constituted negli gence. disentitling the plaintiff from claiming any amount from the Bank in respect of forged cheques. Alternatively it was contended that the principle of estoppel operated against the plaintiff from claiming the amount	 on the ground of adoption or acquiescence. The case of the appellant can be summarised as follows: After reasonable opportunities are given to the customer to examine the Bank statements. its debit entries should be deemed to be final and will not be open for reconstruction to the detriment of the bank. Of course. what is a reasona ble opportunity will depend on the facts of each case. In law	 there can always be a settled or stated account between the banker and the customer. The question to be decided here is whether acceptance by the customer without protest of a balance struck in the pass book or statement of account constitutes a settled account. It is submitted that this aspect of the Banking law has not yet been authorita tively decided by this Court and invited us to pronounce upon it. On the question of estoppel it was contended that a repre senta 1145 tion may be made either by statement or by conduct: and conduct included negligence	 silence	 acquiescence or en couragement. If a customer of a bank	 by his negligence to give timely information of forged cheques	 allows amount to be drawn on such cheques. the debit will stand for the whole amount and the customer will be estopped from claiming the amount. If timely information was given	 the Bank could have acted to ward off the mischief. It was further contended that inaction for a long period would amount to such negligence	 as would persuade a Court to impute to the customer	 with knowledge or at any rate constructive knowledge	 to decline him	 relief in an action for recovery of amounts	 which would be to the detriment of an innocent party	 namely the Bank. For this purpose. dictionary meanings of the word 'know ledge was brought to our notice. "Knowledge may include not only actual knowledge	 i.e. actual awareness of the facts relevant. but constructive knowledge. i.e. knowledge at tributed by law to the party in the circumstances	 whether he actually had the knowledge or not	 and knowledge may be attributed to a person who has sought to avoid finding out	 or has shut his eyes to obvious means of knowledge. e.g. the man who is offered valuables cheaply in circumstances which suggest that they may well have been stolen. but who refrains from enquiry". Black 's Law Dictionary Fifth Edn. defines. "Constructive knowledge" as "If one by exercise of reasonable care would have known a fact. he is deemed to have had costructive knowledge of such fact	 e.g.	 matters of public record". "Notice" means "bringing it to a person 's knowledge". Then he referred us to the Transfer of Property Act. Trusts Act	 Law of Agency. etc. to contend that a person is said to have noticed of a fact when but for wilful absten tion from an enquiry. he would have known it and that in equity a man who ought to have known a fact should be treat ed as if he actually does know it. He then developed his submission as follows: It is accepted to be a duty of customer who knows that his cheques are being forged	 to inform the bank. If he fails to give such an information	 he is estopped from claiming that the cheques were forged. In law. there should be no differ 1146 ence in the consequence between a person having constructive knowledge and a person having actual knowledge. Thus a person having constructive knowledge of a matter. cannot be allowed to take advantage of his own negli gence. According to him the terms of contract between a banker and its customer can never be complete unless there is an implied condition that the customer was under a duty to examine the statement to account	 particularly when the bank issues a notice that if no errors are pointed out within a specified time. the bank will proceed to believe that there are no errors. Such a notice imposes on a customer a duty to react and failure to react would amount to negligence	 leading to estoppel. The company 's Balance Sheet for four years clearly show that the auditors have examined the books and vouchers. It is in evidence (spoken to by PW 8) that the balance sheets were adopted by the general bodies for four successive years. This shows that the statements of account. given by the Bank was accepted as such. There is a duty on the part of the Company 's directors to present a correct Balance Sheet. Negligence to verify the obvious things. like examining the counterfoil of cheques amounts not only to estoppel but to adoption and ratifica tion. for	 no one can take shelter under one 's own failure to examine the obvious. Further	 the annual reports are to be treated as public documents and public are likely to rely upon its representation and defendant bank is	 at any rate	 a member of the public. We have set out above	 the contentions of the appellant	 in detail	 so as to bring into focus	 the questions of law to be decided in the appeal. Now we propose to consider the submissions made by the appellant to test their validity qua the Banking Law	 ap plicable to India. It is true that there is no direct au thority of this Court on this Branch of the Law. It is. therefore	 necessary to briefly outline the confines of this Branch of law. The relationship between the customer of a bank and the bank is that of a creditor and debtor. When a cheque which presented for encashment contains a forged signature the bank has no authority to make payment against such a cheque. The bank would be acting 1147 against law in debiting the customer with the amounts cov ered by such cheques. When a customer demands payment for the amount covered by such cheques. the bank would be liable to pay the amount to the customer. The bank can succeed in denying payment only when it establishes that the customer is disentitled to make a claim either on account of adop tion. estoppel or ratification. The principle of law regard ing this aspect is as follows: When a cheque duly signed by a customer is presented before a bank with whom he has an account there is a mandate on the bank to pay the amount covered by. the cheque. However. if the signature on the cheque is not genuine. there is no mandate on the bank to pay. The bank	 when it makes payment on such a cheque	 cannot resist the claim of the customer with the defence of negligence on his part such as leaving the cheque book carelessly so that third parties would easily get hold of it. This is because a document in cheque form	 on which the customer 's name as drawer is forged	 is a mere nullity. The bank can succeed only when it establishes adoption or estoppel. The relationship between a bank and its customers indi rectly arose before this Court in Bihta Co operative Devel opment Cane Marketing Union Ltd. & Anr. vs The Bank of Bihar & Ors.	 ; In that case a suit was filed by a Society registered under the Bihar and Orissa Co operative Societies Act	 1935	 and its Secretary. This Society had an account with the first defendant Bank. The and 7th defend ants were respectively its Joint Secretary and Treasurer. A sum of Rs.11	000 was withdrawn from the account by means of a cheque	 not from the cheque book of the Society	 but from a loose cheque leaf surrendered by an ex constitutent of the bank. It bore the signature of the 7th defendant but the forged signature of the 6th defendant. The suit against the bank	 its manager and other employees was decreed by the Trial Court and confirmed by the High Court on the question relevant for our purpose but dismissed on the ground juris diction. The question before us in this appeal was consid ered by this Court with reference to a Judgment of the House of Lords in London Joint Stock Bank Ltd. vs Macmillan	 It was argued before this Court that the decree against the bank could not be sustained since even though there was negligence on the part of the bank and its employees	 the plaintiffs ' Society was not altogether free from blame or negligence in that but for the part played by at least one 1148 of its employees in the matter of encashment of the cheque for Rs.11	000 the fraud could not have been perpetrated. It was also argued that if both the parties were negligent or blameworthy. the plaintiffs claim ought not to succeed. It was	 in this connection that Macmillan 's case fell for reference. Being a landmark case	 we would set out the facts of that case in brief: The plaintiffs	 Macmillan etc. brought a suit against the London Stock Bank for a declaration that the bank was not entitled to debit the plaintiffs with a cheque for pound 120. The plaintiffs had in their employment a confidential clerk who made out cheques and got the signature of part ners. On a certain day. the clerk made out a cheque for pound 2 and asked one of the partners to sign it	 which the partner did. The next day the clerk did not turn up. The partners became suspicious and went to the bank. when they discovered that the cheque for pound. 2 was distorted by using the space on either side of the figure '2 ' by the clerk by insertion of additional figures 1 & 0 and thus he pocketed pound. The question before the House of Lords was whether the plaintiffs had been so negligent with regard to the cheque that their action against the bank should fail. The Trial Judge found that the plaintiffs were not guilty of negligence in the mode of signing the cheque and decreed the suit. The Court of Appeal upheld this decision. The House of Lords reversed the judgment. We may usefully quote the following passages from the Judgment. Lord Finlay observed: "As the customer and the banker are under a contractual relation in this matter. it ap pears obvious that in drawing a cheque the customer is bound to take usual and reasonable precautions to prevent forgery. Crime	 is indeed	 a very serious matter	 but every one knows that crime is not uncommon. If the cheque is drawn in such a way as to facilitate or almost invite an increase in the amount by forgery if the cheque should get into the hands of a dishonest person	 forgery is not a remote but a very natural consequence of negligence of this description. " The learned Lord Chancellor further observed: Of course the negligence must be in the trans action itself	 that is	 in the manner in which the cheque is drawn. It would be no defence to the banker	 if the forgery had been that of a clerk of a customer	 that the latter had taken the clerk into his service without sufficient inquiry as to his 1149 character. Attempts have often been made to extend the principle of Young vs Grote	 ; beyond the case of negligence in the immediate transaction	 but they have always failed. According to the learned Lord Chancellor	 leaving blank spaces on either side of the figure '2 ' in the cheque amounted to a clear breach of duty which the customer owed to the banker. The learned Lord Chancellor said: "If the customer chooses to dispense with ordinary precautions because he has complete faith in his clerk 's honesty	 he cannot claim to throw upon the banker the loss which re sults. No one can be certain of preventing forgery	 but it is a very simple thing in drawing a cheque to take reasonable and ordi nary precautions against forgery. If owing to the neglect of such precautions it is put into the power of any 'dishonest person to increase the amount by forgery	 the customer must bear the loss as between himself and the banker. " The principles so settled by the House of Lords was pressed into service before this Court in the above case. This Court held that the principle settled by the House of Lords could not help the bank. The accepted principle that if the signatures on the cheque is genuine	 there is a mandate by the customer to the bank to pay was reiterated. It was also held that if an unauthorised person got hold of such a cheque and encashed it	 the bank might have had a good defence hut	 however	 if the signatures on the cheque or at least one of the signatures are or is not genuine 	 ' there is no mandate on the bank to pay and the question of any negligence on the part of the customer	 such as leaving the cheque book carelessly so that a third party could easily get hold of it would afford no defence to the bank. This Court distinguished Macmillan 's case	 observing that if any of the signatures was forged the question of negligence of the customer in between the signature and the presenta tion of the cheque never arose. The suit was	 however	 dismissed on another point and that of jurisdiction. That takes us to the question as to whether there is a duty on the part of the customer to examine the pass book and inner part of cheques and to communicate to the banker within a reasonable time of the debits which he does not admit. 1150 The kindered question connected with this is whether a customer is estopped from disputing the debits shown in the pass book when the pass book is returned without any comment and whether such a conduct would constitute a "stated and settled account." To answer this it is necessary to examine the question whether the customer owes a duty to the bank to inform it about the correctness or mis statements in the entries in the pass book within a reasonable time and wheth er failure to do so would amount to such negligence as to non suit him in a suit for recovery of the amount paid on a forged cheque. When does negligence constitute estoppel ? For negligence to constitute an estoppel it is necessary to imply the existence of some duty which the patty against whom estoppel is alleged owes to the other party. There is a duty of sorts on the part of the customer to inform the bank of the irregularities when he comes to know of it. But by mere negligence One cannot presume that there has been a breach of duty by the customer to the bank. The customer should not by his conduct facilitate payment .of money on forged cheques. In the absence of such circumstances	 mere negligence will not prevent a customer from successfully suing the bank for recovery of the amount. A case of acquiescence also cannot be flourished against the plaintiff. In order to sustain a plea of acquiescence	 it is necessary to prove that the party against whom the said plea is raised	 had remained silent about the matter regarding which the plea of acquiescence is raised	 even after knowing the truth of the matter. As indicated above	 the plaintiff did not	 during the relevant period	 when these 42 cheques were encashed	 know anything about the sinister design of the second defendant. If the bank had proved to the satisfaction of the Court that the plaintiff had with full knowledge acknowledged the correctness of the accounts for the relevant period	 a case of acquiescence against the plaintiff would be available to the bank. That is not the case here. In this judgment under appeal	 the High Court has elabo rately considered the law obtaining in the United States of America on this aspect. We need not exercise ourselves with the American Law since the American Law is different from the law that we follow. On the questions involved in this appeal	 it is the .law that obtains in England which had been followed by this Court and High Courts in the country. The authorities in England have more or less consistently held that there is no duty on the part of the customer to intimate the banker about any error that may be seen in the pass book and that he will be entitled to claim any amount paid on a forged cheque though there may be some negligence or in action on his part in not being careful to 1151 discover the errors in the pass book or other documents. In the instant ease	 there is no evidence to show that anyone other than the second defendant knew that the forged cheques had been encashed. After the matter was discovered	 immedi ate action was taken. Therefore	 in the absence of any evidence of the plaintiff 's involvement	 the plaintiff cannot be nonsuited on the ground of negligence or in ac tion. Venkatramiah	 J when he rendered the Judgment	 under appeal	 laid down the law correctly	 with the aid of author ities then available and on his own reasons. Now we are in a more advantageous position. We have an authority	 more or less identical on facts	 rendered by the Privy Council in the decision in Tai Hing Cotton Ltd. vs Liu Chong Bank	 [1985] 2 All England Reports 947. The facts of this case are similar to the case on hand; if anything	 more to the disadvantage to the bank in terms of money involved than the instant case. The appellant before the Privy Council was a company	 a textile manufac turer carrying on business in Hong Kong. The company was a customer of the three respondent banks and maintained with each of them a current account. The banks were authorised to pay cheques on behalf of the company if signed by its Manag ing Director or two authorised signatories. The banks agreed to send the appellant periodic statements which were deemed to be confirmed unless the customer notified the bank of any error therein by a specified time. Between 1972 and 1978 the accounts clerk employed by the company forged the signature of the Managing Director on 300 cheques purported to be drawn by the company for a total sum of $HK.5.5 million. The banks paid the cheques on presentation by the clerk and debited the company 's current account accordingly. The clerk was able to manipulate the accounts without any obstruction or discovery because he was in almost sole control of the receipts and payments made through the accounts. As in this case	 the fraud was uncovered in May	 1978	 when a newly appointed accountant commenced reconciling the bank state ments with the company 's books. This was an exercise which had not been followed previously. The new accountant found at once that something was seriously wrong. He reported the matter to the Managing Director. The errant accountant was interrogated and he admitted the frauds. The company took action against the banks	 the accountant and his wife. The Trial Judge basing his decision on the fundamental premise that a forged cheque is no mandate to pay held that unless the bank established affirmatively that they were entitled to debit the customers current account with the amounts of the forged cheques	 the customer was entitled to the relief 1152 of the loss arising from the bank 's payment on the forged cheques. A case was put forward before the Trial Judge that the Company was vicariously liable for the fraud played by its accountant. This was negatived and was not pursued. The Trial Judge also rejected the submission of the banks that their terms of business which was contractual called the banking contract	 should be construed as ousting the common law rule. The defence included one of estoppel raised by each of the banks. The plea of estoppel was put forward in two ways; first	 that the company was estopped by its negli gence in the management of its bank accounts from asserting that the accounts had been wrongly debited	 and second	 that the company was estopped by a representation to be implied from the course of conduct that the periodic bank statements were correct. The Trial Judge rejected the plea of estoppel by negligence but held: " . . In the case of each bank the company by failing to . challenge the debits shown on the bank statements	 had represented to each bank that the debits had been correctly made. He held that Tokyo and Chekiang had acted in reliance on the representations so made by their willingness to continue operating their respective accounts and to expose themselves to the risk of paying out on forged cheques. He did not find the same prejudice had been suffered by Liu Chong Hing as it only became exposed to the fraud in November 1977	 the first representation to it not being made until the company 's failure. to query the December 1977 statement of account. The Judge found that the chance of recovery from Leung had not been substantially diminished during the period (December 1977 to May 1978) during which it could be said that the estoppel was operative. " On this finding the Judge gave the company Judgment against one bank	 but dismissed its claims against the other two banks. The company appealed and the defeated banks cross appealed. The Court of appeal differed from the Trial Judge on the general question. The Court of appeal evolved a theory that the banker/customer relationship is such as to give rise to a general duty of care in the operation of its banking account and on this basis held that the company was in breach of the duty which they held	 it owed to the banks and must bear the loss. According to the Court of appeal this duty arose in tort as well as in contract. There was difference of opinion among the Judges as to whether the in action on the part of the customer in not objecting 1153 to the statement sent by the bank within the time specified would constitute conclusive evidence of the correctness of the debits recorded therein or whether the banking contracts could be construed as including a term requiring the monthly statements to be treated after a period of time as conclu sive evidence of the state of the account. But all of them were agreed that estoppel operated against the company by its own negligence from challenging the correctness of the banks statements. The banks thus succeeded in the Court of appeal. The defeated company moved the Judicial Committee of the Privy Council by filing appeals. This was how the matter reached the Privy Council. The Privy Council had to decide the case in the light of the law settled by the House of Lords in the Macmillan 's case and in Greenwood vs Martins Bank Ltd.; = 1932 All England Reports 3 18. The Privy Council posed two questions before it	 first	 whether English law recognises any duty of care owed by the customer to his bank in the operation of a current account beyond	 first	 a duty to refrain from drawing a cheque in such a manner as may facil itate fraud or forgery and	 second	 a duty to inform the bank of any forgery of cheque purportedly drawn on the account as soon as he	 the customer	 becomes aware of it. The respondent banks while recognising the existence of both the duties indicated above contended that the law had evolved in England after 19 18 and 1933 in recognising an altogether wider duty of care. This duty	 according to them	 required the customer to take reasonable precautions in the management of his business with the bank to prevent forged cheques being presented to it for payment. Additionally	 it was contended. that even if this wider duty did not exist. at any rate the customer owed a duty to take such steps to check the periodic bank statements sent to him as a reasona ble person in his pOsition would take to enable him to notify the bank of any debit items in the account which he had not authorised	 When it is accepted that the bank sent periodic statements to the customer	 the bank contended that the duty and responsibility to look into such statements and to notify to the bank were necessary incidents of the con tractual relationship between the customer and the bank. The source of this obligation according to the banks is to be found both in the contract law as an implied term of the banking contract and in the tort law as a civil obligation arising from the relationship of banker and customer. Then the Privy Council proceeded to consider the weightier sub 1154 missions advanced by the bank (1) a wider duty on the part of the customer to act with diligence which must be implied into the contract and alternatively that such a duty arises in tort from the relationship between banker and customer. The Privy Council parted company with the observation by the Court of Appeal here and repelled the plea that it was necessary to imply into a contract between a banker and the customer a wider duty and that it was not a necessary inci dent of banker customer relationship that the customer should owe his banker a wider duty of care. This duty is in the form of an undertaking by the customer to exercise reasonable care in executing his written orders so as not to mis lead the bank or to facilitate forgery. The Privy Coun cil accepted that an obligation should be read into the contract as the nature of this contract implicity requires. In other words 'the term sought to be implied must be one without which the whole 'transaction would become futile and inefficacious. ' After referring to some earlier decisions	 the Privy Council rejected the implied term 'submission ' and set out the limits of the care of the customer and the functions of the banks in the following words: " . One can fully understand the com ment of Cons JA that the banks must today look for protection. So be it. They can increase the severity of their terms of business and they can use their influence as they have in the past	 to seek to persuade the legislature that they should be granted by statute 'fur ther protection. But it does not follow that because they may need protection as their business expands the necessary incidents of their relationship with their customer must also change. The business of banking is the business not of the customer but of the bank. They offer a service	 which is to honour their customer 's cheques when drawn on an account in credit or within an agreed overdraft limit. If they pay out on cheques which are not his	 they are acting outside their mandate and cannot plead his authority in justification of their debit to his account. This is a risk of the service which it is their business to offer. The limits set to the risk in the Macmillan and Greenwood cases can be seen to be plainly necessary incidents of the relationshi p. Offered such a service	 a customer must obviously take care in the way he draws his cheque	 and must obviously warn his bank as soon as he knows that a forger is operating the account . . " The limits of the duty and the confines of contractual obligation cannot be expressed better. 1155 On the question of tort also the bank could not satisfy the Privy Council as is seen from the following observation: "Their Lordships do not believe that there is anything to the advantage of the law 's development in searching for a liability in tort where the parties are in a contractual relationship. This is particularly so in a commercial rela tionship. Though it is possible as a matter of legal seman tics to conduct an analysis of the rights and duties inher ent in some contractual relationships including that of a banker and customer either as a matter of contract law when the question will be what. if any. terms are to be implied or as a matter of tort law when the task will be to identify a duty arising from the proximity and character of the relationship between the parties. their Lordships believe it to be correct in principle and necessary for the avoidance of confusion in the law to adhere to the contractual analy sis on principle because it is a relationship in which the parties have. subject to a few exceptions	 the right to determine their obligations to each other. and for the avoidance of confusion because different consequences do follow according to whether liability arises from contract or tort	 e.g. in the limitation of action . " Their Lordships of the Privy Council sumed up the Law	 as followers: 'Their Lordships do not	 therefore	 embark on an investiga tion whether in the relationship of banker and customer it is possible to identify tort as well as contract as a source of the obligations owed by the one to the other. Their Lordships do not	 however	 accept that the parties ' mutual obligations in tort can be any greater than those to be found expressly or by necessary implication in their con tract. If	 therefore	 as their Lordships have concluded	 no duty wider than that recognised in Macmillan and Greenwood can be implied into the banking contract in the absence of express terms to that effect	 the respondent banks cannot rely on the law of tort to provide them with greater protec tion than that for which they have contracted. Having rejected the plea of implied terms	 indirectly con structive 1156 notice and estoppel by negligence	 it was held that the company was not under any breach of duty owed by it to the banks and as such mere silence	 omission or failure to act is not a sufficient ground to establish a case in favour of the bank to non suit its customer. We adopt the reasoning indicated above with great re spect. Unless the bank is able to satisfy the Court of either an express condition in the contract with its custom er or an unequivocal ratification it will not be possible to save the bank from its liability. The banks do business for their benefit. Customers also get some benefit. If banks are to insist upon extreme care by the customers in minutely looking into the pass book and the statements sent by them	 no bank perhaps can do profitable business. It is common knowledge that the entries in the pass books and the state ments of account sent by the bank are either not readable	 decipherable or legible. There is always an element of trust between the bank and its customer. The bank 's business depends upon this trust. Whenever a cheque purporting to be by a customer is presented before a bank it carries a man date to the bank to pay. If a cheque is forged there is no such mandate. The bank can escape liability only if it can establish knowledge to the customer of the forgery in the cheques. In action for continuously long period cannot by itself afford a satisfactory ground for the bank to escape the liability. The plaintiff in this case swung into action immediately on the discovery of the fraud committed by its accountant as in the case before the Privy Council. We may	 in passing. refer to a decision of this court on the question of negligence under circumstances not strictly akin to the case on hand reported in the New Marine Coal Co. (Bengal) Pvt. Ltd. vs Union of India	 ; There the suit was for recovery of certain amount represent ing the price of coal supplied to the respondent. Inter alia the respondent pleaded in defence of the suit that the respondent had issued and sent bills to cover the amount and the intimation cards in accordance with the usual practice in the ordinary course of dealings. The respondents it was alleged paid the amount by cheque to a person authorised by the appellant and on presentation of proper receipts. It was pleaded that the appellant 's claim having been satisfied he had no cause of action. It was established in the course of the trial that the appellant had not in fact authorised any person to issue the receipts but a certain person not con nected with the appellant firm without the consent or knowl edge of the appellant got hold of the intimation cards and bills addressed to the appellant. forged the documents and fraudulently received the cheque from the respondent and 1157 appropriated the amount for himself. We may usefully read the following passage relating to negligence in the context of a plea based on estoppel: ". . Apart from	 this aspect of the matter	 there is another serious objection which has been taken by Mr. Setalved against the view which prevailed with Mukharji J. He argues that when a plea of estoppel on the ground of negligence is raised	 negligence to which reference is made in support of such a plea is not the negligence as is understood in popu lar language or in common sense; it has a technical denota tion. In support of a plea of estoppel on the ground of negligence. it must be shown that the party against whom the plea is raised owed a duty to the party who raises the plea. Just as estoppel can be pleaded on the ground of misrepre sentation or act or omission. so can estoppel be pleaded on the ground of negligence; but before such a plea can suc ceed	 negligence must be established in this technical sense. As Halsbury has observed: 'before anyone can be estopped by a representation inferred from negligent con duct. there must be a duty to use due care towards the party misled	 or towards the general public of which he is one. ' There is another requirement which has to be proved before a plea of estoppel on the ground of negligence can be upheld and that requirement is that 'the negligence on which it is based should not be indirectly or remotely connected with the misleading effect assigned to it	 but must be the proxi mate or real cause of that result. ' Negligence. according to Halsbury	 which can sustain a plea of estoppel must be in the transaction itself and it should be so connected with the result to which it led that it is impossible to treat the two separately. This aspect of the matter has not been duly examined by Mukharji. J. when he made his finding against the appellant. " This is how this Court understood how a plea of estoppel based on negligence can be successfully put forward. We have seen that there is no duty for a customer to inform the bank of fraud committed on him. of which he was unaware. Nor can in action for a reasonably long time in not discovering fraud or irregularity be made a defence to defeat a customer in an action for loss. Thus the contentions put for 1158 ward by the bank cannot be accepted to defeat the plaintiff. The various submissions made by the counsel for the bank based on constructive notice in the general law and on other branches of law cannot be extended to relationship between a bank and its customers. On a careful analysis of the questions of law	 we hold that the judgment of the High Court and that of the Trial Judge have to be upheld. We do so. We accordingly dismiss the appeal with costs of the 1st respondent. N.P.V. Appeal dis missed.

The respondent company had a current account with the lant bank in its Mangalore Builder Branch. The Manag ing Director of the company and the General Manager of a sister concern of the company had been authorised to operate the said current account. The second defendant was attending to the maintenance of accounts of the respondent company and was also in charge and had the custody of the cheque book issued by the Bank to the respondent company. During the process of bringing the accounts upto date certain irregu larities were noticed in the account and on verification it was found that cheques purporting to bear the signature of the Managing Director were encashed	 though they did not bear 'his signature. A complaint was lodged by the respond ent Company with the police and a special audit of the company 's accounts for the years 1957 58 to 1960 61 by a firm of Chartered Accountants disclosed that the second defendant had withdrawn a sum of Rs.3	26.047.92 under 42 cheques. A suit was filed for the recovery of the said amount on the plea that the amounts as per the forged cheques were not utilised for the purpose of the respondent company. that they were not authorised ones. that there was no acquiescence or ratification open or tacit on the part of the respondent company and that the respondent was unaware of the fraud till the new accountant discovered it. The appellant bank resisted the suit on the grounds (1) that the cheques were not forged ones; (2) that even if they were forged ones. the company was not entitled to recover the amount on account of its own 1139 negligence; (3) that there was settlement of accounts be tween the parties from time to time and as such. the company was not entitled to reopen the same and claim the sums paid under the cheques; and (4) that the suit was barred by limitation. The second defendant pleaded that the cheques were utilised for the purpose of the company. The trial Court negatived the contentions of the bank and passed a decree for the sum claimed with interest at 6%. In appeal the Division Bench confirmed the judgment of the trial court but as the case involved substantial ques tions of law of general public importance it granted a certificate to file the appeal. In the appeal before this Court it was contended on behalf of the appellant that: (1) after reasonable opportu nities are given to the customer to examine the bank state ments	 its debit entries should be deemed to be final and will not be open for reconstruction to the detriment of the bank; (2) a representation may be made either by statement or by conduct	 and conduct included negligence	 silence	 acquiescence or encouragement	 and if a customer of a bank	 by his negligence	 to give timely information of forged cheques	 allows amount to be drawn on such cheques. the debit will stand for the whole amount and the consumer will be estopped from claiming the amount; and (3) in action for a long period would amount to such negligence as would persuade a court to impute to the customer with knowledge or at any rate constructive knowledge	_to decline him relief in an action for recovery of amounts which would be to the detriment of an innocent party	 namely	 the bank. Dismissing the appeal. HELD: 1. When a cheque duly signed by a customer is presented before a bank with whom he has an account there is a mandate on the bank to pay the amount covered by the cheque. However. if the signature on the cheque is not genuine. there is no mandate on the bank to pay. The bank. when it makes payment on such a cheque	 cannot resist the claim of the customer with the defence of negligence on his part such as leaving the cheque book carelessly so that third parties would easily get hold of it. This is because a document in cheque form. on which the customer 's name as drawer is forged. is a mere nullity. [1147B D] 2. The relationship between the customer of a bank and the bank is that of a creditor and debtor. When a cheque presented for encashment contains a forged signature the bank has no authority to make payment against such a cheque. The bank would be acting against law 1140 in debiting the customer with the amounts covered by such cheques. When a customer demands payment for the amount covered by such cheques	 the bank would be liable to pay the payment to the customer. The bank can succeed in denying payment only when it establishes that the customer is disen titled to make a claim either on account of adoption	 estop pel or ratification. [1146G H; 1147A B] For negligence to constitute an estoppel. it is neces sary to imply the existence of some duty which the party against whom estoppel is alleged owes to the other party. There is a duty of sorts on the part of the customer to inform the bank of the irregularities when he comes to know of it. But by mere negligence. one cannot presume that there has been a breach of duty by the customer to the bank. The customer should not by his conduct facilitate payment of money on forged cheques. In the absence of such circum stances. mere negligence will not prevent a customer from successfully suing the bank for recovery of the amount. [1150B D] 4. In order to sustain a plea of acquiescence	 it is necessary to prove that the party against whom the said plea is raised. had remained silent about the matter regarding which the plea of acquiescence is raised. even after knowing the truth of the matter. [1150D E] 5. There is no duty for a customer to inform the bank of a fraud committed on him	 of which he was unaware. Nor can in action for a reasonably long time in not discovering fraud or irregularity be made a defence to defeat a customer in an action for loss. [1157G H] 6. There is no duty on the part of the customer to intimate the banker about any error that may be seen in the pass book and he will be entitled to claim any amount paid on a forged cheque though there may be some negligence or in action on his part in not being careful to discover the errors in the pass book or other documents. Banks do business for their benefit. Customers also get some benefit. If banks are to insist upon extreme care by the customers in minutely looking into the pass book and the statements sent by them	 no bank perhaps can do profita ble business. It is common knowledge that the entries in the pass books and the statements of account sent by the bank are either not readable. decipherable or legible. There is always an element of trust between the bank and its custom er. The bank 's business depends upon this trust. [1156B D] 1141 8. Whenever a cheque purporting to be by a customer is presented before a bank it carries a mandate to the bank to pay. If a cheque is forged there is no such mandate. The bank can escape liability only if it can establish knowledge to the customer of the forgery in the cheques. In action for continuously long period cannot by itself afford a satisfac tory ground for the bank to escape the liability. [1156D E] 9. In the present case. during the relevant period when 42 cheques were encashed	 the company did not know anything about the sinister design of the second defendant. Since the bank had not proved to the satisfaction of the court that the company had with full knowledge acknowledged the cor rectness of the accounts for the relevant period the case of acquiescence cannot be flourished against the company. There is no evidence to show that any one other than the second defendant knew that the forged cheques had been encashed. After the matter was discovered immediate action was taken. Therefore	 in the absence of any evidence of the respondent company 's involvement. it cannot be non suited on the ground of negligence or in action. Unless the bank is able to satisfy the court of either an express condition in the contract with its customer or an unequivocal ratifica tion it will not be possible to save the bank from its liability. [1150E F; 1151A B; 1156B] Bihta Co operative Development Cane Marketing Union Ltd. Joint Stock Bank Ltd. vs Macmillan	 ; Tai Hing Cotton Ltd. vs Liu Chong Bank	 [1985] 2 All England Reports 947; Greenwood vs Martins Bank Ltd.	 = [1932] All England Reports 318; and New Marine Coal Co. (Bengal) Pvt. Ltd. vs Union of India	 ; 	 referred to.