Document:

EX-4.1

 Exhibit 4.1 

THIS NOTE HAS NOT BEEN REGISTERED UNDER THE FEDERAL OR ANY STATE SECURITIES LAWS AND MAY NOT BE SOLD, TRANSFERRED OR HYPOTHECATED IN ABSENCE OF AN EFFECTIVE
REGISTRATION STATEMENT UNDER SUCH LAWS AS MAY BE APPLICABLE OR, AN OPINION OF COUNSEL THAT AN EXEMPTION FROM SUCH APPLICABLE LAWS EXIST. 

PROMISSORY NOTE 
  

									
	Principal Amount:		$500,000.00				Issuance Date:		April 24, 2015
	Maturity Date:		July 2, 2015						

 FOR VALUE RECEIVED, Authentidate Holding Corp., a Delaware corporation (the “Borrower”), with its
principal offices located at 300 Connell Drive, Fifth Floor, Berkeley Heights, N.J. 07922, hereby promises to pay to the order of LAZARUS INVESTMENT PARTNERS LLLP (the “Holder”) at such address as the Holder designates in writing to the
Borrower, the principal sum of Five Hundred Thousand Dollars ($500,000.00) (the “Principal Amount”), on the earlier of the Maturity Date stated above, or the Accelerated Payment Date (as defined below). This Note is a direct obligation of
the Borrower. 
 1. Interest on this Note shall be computed at the rate of 0.48% per month, payable in arrears on the Maturity Date or
the Accelerated Payment Date, at which time all accrued and unpaid interest shall be immediately due and payable. All computations of interest payable hereunder shall be on the basis of a 365-day year and actual days elapsed in the period for which
such interest is payable. Accrued interest on the outstanding principal amount shall be due and payable on the Maturity Date or the Accelerated Payment Date in cash. Payments of all amounts due hereunder shall be made in lawful money of the United
States. 
 2. Payment of the Principal Amount of this Note, and interest thereon, shall be made upon the surrender of this Note to the
Borrower, at its chief executive office (or such other office within the United States as shall be designated by the Borrower to the Holder hereof) (the “Designated Office”), in such coin or currency of the United States of America
as at the time of payment shall be legal tender for the payment of public and private debts. If the Maturity Date (or the Accelerated Payment Date) shall be a Saturday or a Sunday or shall be a legal holiday in the State of New York, then such
action may be taken or such right may be exercised on the next succeeding day not a legal holiday. For purposes of this note, a “month” shall mean a 30 day period. 

3. As used herein, the term “Accelerated Payment Date” shall mean the closing by the Borrower of a sale of equity or debt securities
of the Company, or series of closings, as part of the same transaction, of equity or debt securities within a period of 30 days, in the gross amount of at least $900,000 in cash proceeds. 

4. Events of Default. 

(a) For purposes of this Note, an “Event of Default” shall consist of any of the following events: 

(1) The Borrower shall fail to pay any portion of the Principal Amount of this Note when the same becomes due and payable, whether at the
Maturity Date or at any accelerated date of maturity or at any other date fixed for payment, and such default continues for 10 days or more. 

  
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 (2) The Borrower shall voluntarily commence any case, proceeding or other action under any
existing or future law of any jurisdiction, domestic or foreign, relating to bankruptcy, insolvency, or relief of debtors, seeking to have an order for relief entered with respect to it, or seeking to adjudicate it as bankrupt or insolvent, or
seeking other relief with respect to its debts; or a court shall enter an order for relief or any such adjudication or appointment, which case, proceeding or action or order, adjudication, or appointment, as the case may be, remains undismissed,
undischarged or unbonded for a period of 30 days, then, or any time thereafter during the continuance of any of such events. 
 (3) A final
judgment for money damages or order for the payment of money damages in excess of One Hundred Thousand Dollars ($100,000) (exclusive of amounts covered by insurance) shall be entered against the Borrower, which has not been vacated or stayed within
15 days of entry. 
 (4) Any material representation or warranty of the Borrower herein shall prove to have been false in any material
respect upon the date when made. 
 (5) The occurrence of a default (after giving effect to any grace periods or rights to cure held by the
Borrower) under any material indebtedness of the Borrower resulting from other than the failure to timely pay interest or principal of such indebtedness which results in the acceleration of the maturity of such indebtedness. 

(6) The Borrower shall liquidate, dissolve, terminate or suspend its business operations. 

(b) Acceleration of Payment. If an Event of Default (other than an Event of Default specified in Section 4(a)(2) hereof with
respect to the Company) occurs and is continuing, the Holder, by written notice to the Company, may declare due and payable the principal amount of this Note, plus accrued and unpaid interest thereon. Upon a declaration of acceleration, such
principal shall be immediately due and payable. If an Event of Default specified in Section 4(a)(2) occurs with respect to the Company, the principal of this Note shall become and be immediately due and payable, without any declaration or other
act on the part of the Holder. Further, upon an Event of Default, from such date of the Event of Default, Holder shall be entitled, and this Note shall bear interest at the rate of 2.48% per month. Upon the payment in full of the amounts due
under this Note, the Holder shall promptly surrender this Note to or as directed by the Borrower. 
 (c) Collections. If an
Event of Default with respect to this Note occurs and is continuing, the Holder may pursue any available remedy by proceeding at law or in equity to collect the defaulted payment or to enforce the performance of any provision of this Note.
Notwithstanding any other provision in this Note, the Holder of this Note shall have the right, which is absolute and unconditional, to receive payment of the principal in respect of the Notes held 

  
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by the Holder, on or after the final Maturity Date, or to bring suit for the enforcement of any such payment on or after such date, and such rights shall not be impaired or affected adversely
without the consent of the Holder. 
 (d) No Exclusive Right or Remedy. Except as otherwise provided herein, no right or remedy
conferred in this Note upon the Holder is intended to be exclusive of any other right or remedy, and every right and remedy shall, to the extent permitted by law, be cumulative and in addition to every other right and remedy given hereunder or
hereafter existing at law or in equity or otherwise. The assertion or employment of any right or remedy hereunder, or otherwise, shall not prevent the concurrent assertion or employment of any other appropriate right or remedy. No delay or
omission of the Holder of this Note to exercise any right or remedy accruing upon any Event of Default shall impair any such right or remedy or constitute a waiver of any such Event of Default or any acquiescence therein. Every right and remedy
given by this Section 4 or by law to the Holder may be exercised from time to time, and as often as may be deemed expedient, by the Holder. 

5. Transferability; Loss and Replacement. 

(a) This Note has not been registered under the Securities Act, or the securities laws of any state or other jurisdiction. Neither this
Note nor any interest or participation herein may be reoffered, sold, assigned, transferred, pledged, encumbered or otherwise disposed of (a “Transfer”) in the absence of registration under the Securities Act and any applicable
state securities laws, or unless (i) such transaction is exempt from, or not subject to, registration under the Securities Act or the securities laws of any state or other jurisdiction and (ii) is made in compliance with applicable federal
and state statutory resale restrictions, if any. The Holder by its acceptance of this Note agrees that it shall not offer, sell, assign, transfer, pledge, encumber or otherwise dispose of this Note or any portion thereof or interest therein
other than in a minimum denomination of $50,000 principal amount (or any integral multiple of $10,000 in excess thereof) and then (other than with respect to a Transfer pursuant to a registration statement that is effective at the time of such
Transfer) only (a) to the Borrower, (b) to an affiliate of the Holder, (c) to a Person it reasonably believes to be an “accredited investor” within the meaning of Rule 501(a) under the Securities Act, or
(d) pursuant to a transaction in compliance with Rule 144 or Rule 144A under the Securities Act, and in the case of (b), (c) and (d) above in which the transferor furnishes the Borrower with such certifications, legal opinions or
other information as the Borrower may reasonably request to confirm that such transfer is being made pursuant to an exemption from, or in a transaction not subject to, the registration requirements of the Securities Act as applicable.

(b) By receipt and acceptance of this Note, Holder and any permitted transferee represents and warrants to the Borrower that (i) it is an
“accredited investor” as defined in Rule 501(a)(1), (a)(2), (a)(3), (a)(7) or (a)(8) under the Securities Act; (ii) either alone or together with its representatives, has such knowledge, sophistication and experience in business and
financial matters so as to be capable of evaluating the merits and risks of the prospective investment in the Note, and has so evaluated the merits and risks of such investment; (iii) is able to bear the economic risk of an investment in the
Note and, at the present time, is able to afford a complete loss of such investment; (iv) understands that the Note will be characterized as “restricted securities” under U.S. federal securities laws and have not been and are not
being registered under the Securities Act or 

  
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any state securities laws, must be held indefinitely and may not be offered for sale, sold, assigned or transferred except in accordance therewith and (vii) it has reviewed the
Borrower’s filings with the Securities and Exchange Commission (“SEC Report”) and has been afforded (A) the opportunity to ask such questions as it has deemed necessary of, and to receive answers from, representatives of the
Borrower concerning the terms and conditions of this Note and the merits and risks of the prospective investment in the Note and the Borrower generally and, (B) it has access to information about the Borrower and its subsidiaries and their
respective financial condition, results of operations, business, properties, management and prospects sufficient to enable it to evaluate the terms and conditions of this Note and the merits and risks of the prospective investment in the Borrower.

 (c) The Transfer of this Note is registrable on the books of the Borrower upon surrender of this Note for registration of Transfer at the
Borrower’s designated office, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Borrower duly executed by, the Holder hereof or such Holder’s attorney duly authorized in writing, and thereupon
one or more new Notes, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees. Prior to due presentation of this Note for registration of Transfer, the Borrower and
any agent of the Borrower may treat the Person in whose name this Note is registered as the owner thereof for all purposes, whether or not this Note be overdue, and neither the Borrower nor any such agent shall be affected by notice to the contrary.
Upon presentation of this Note for registration of Transfer at the Borrower’s designated office accompanied by (i) certification by the transferor that such Transfer is in compliance with the terms hereof and (ii) by a written
instrument of Transfer in a form approved by the Borrower executed by the Holder, in person or by the Holder’s attorney thereunto duly authorized in writing, and including the name, address and telephone and fax numbers of the transferee and
name of the contact person of the transferee, such Note shall be transferred on the Note Register, and a new Note of like tenor and bearing the same legends shall be issued in the name of the transferee and sent to the transferee at the address and
c/o the contact person so indicated. Transfers and exchanges of Notes shall be subject to such additional restrictions as are set forth in the legends on the Notes and to such additional reasonable regulations as may be prescribed by the
Borrower as specified herein. Successive registrations of Transfers as aforesaid may be made from time to time as desired, and each such registration shall be noted on the Note register. No Transfer shall be allowed except to an
“accredited investor” as defined under the rules and regulations of the Securities and Exchange Commission. 
 (d) Upon receipt by
the Borrower of evidence reasonably satisfactory to it of the loss, theft, destruction or mutilation of this Note, and in the case of loss, theft or destruction, receipt of indemnity reasonably satisfactory to the Borrower and upon surrender and
cancellation of this Note, if mutilated, the Borrower will deliver a new Note of like tenor and dated as of such cancellation, in lieu of such Note. 

6. Miscellaneous. 
 (a)
This Note constitutes the entire agreement between the parties relating to the subject matter hereof and supersedes any and all previous agreements and understandings, oral or written, relating to the subject matter hereof. Neither this Note nor any
term hereof may be 

  
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amended or waived orally or in writing, except that any term of this Note may be amended and the observance of any term of this Note may be waived (either generally or in a particular instance
and either retroactively or prospectively), and such amendment or waiver shall be applicable upon the approval of the Borrower and the Holder. 

(b) This Note and the rights and obligations of the Holder and of the undersigned shall be governed and construed in accordance with the laws
of the State of New York. 
 (c) Upon the occurrence and during the continuance of an Event of Default under this Note, the Borrower shall,
upon demand, pay to the Holder the amount of any and all reasonable costs and expenses (including reasonable attorneys’ fees) that Holder may incur in connection with the enforcement or collection of this Note. 

(d) No failure or delay on the part of the Holders hereof in the exercise of any power, right or privilege hereunder shall operate as a waiver
thereof, nor shall any single or partial exercise of any such power, right or privilege preclude other or further exercise thereof or of any other right, power or privilege. All rights and remedies existing hereunder are cumulative to, and not
exclusive of, any rights or remedies. 
 (e) The Borrower hereby, to the fullest extent permitted by applicable law, waives presentment,
demand, notice (including without limitation notice of default (except as otherwise specifically set forth herein), notice of protest, notice of intention to accelerate maturity, notice of acceleration of maturity and notice of nonpayment or
dishonor), protest and all other demands and notices in connection with delivery, acceptance, performance, default, acceleration or enforcement of or under this Note, and the bringing of suit and diligence in taking any action to collect amounts
owing hereunder or in proceeding against any of the rights and properties securing payment hereof, and is directly and primarily liable for the amount of all sums owing or to be owing hereon. No extension of the time for the payment of this Note
made by agreement with any person now or hereafter liable for the payment of this Note shall operate to release, discharge, modify, change or affect the original liability of the Borrower under this Note. 

(f) To the extent that Holder receives any payment on account of any of Borrower’s obligations under this Note, and any such payment(s)
or any part thereof are subsequently invalidated, declared to be fraudulent or preferential, set aside, subordinate and/or required to be repaid to a trustee, receiver or any other person or entity under any bankruptcy act, state or federal law,
common law or equitable cause, then, to the extent of such payment(s) received, the Borrower’s obligations or part thereof intended to be satisfied shall be revived and continue in full force and effect, as if such payment(s) had not been
received by the Holder and applied on account of Borrower’s obligations. 
 (g) Section headings used herein are for convenience
of reference only, are not part of this Note and shall not affect the construction of, or be taken into consideration in interpreting, this Note. 

(h) If any provision of this Note is invalid, illegal or unenforceable, the balance of this Note shall remain in effect, and if any provision
is inapplicable to any person or 

  
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circumstance, it shall nevertheless remain applicable to all other persons and circumstances. If the Borrower is at any time required or obligated to pay interest hereunder at a rate that would
be in excess of a statutory or legally permitted rate, then the rate of interest shall be deemed to be immediately reduced to such maximum rate and the interest payable shall be computed at such maximum rate and any prior interest payments in excess
of such maximum rate shall be applied and shall be deemed to have been payments in reduction of the principal balance of this Note.
 (i)
All notices, offers, acceptance and any other acts under this Note (except payment) shall be in writing, and shall be sufficiently given if delivered to the addressees in person, by FedEx or similar receipted next business day delivery, or by
facsimile or email delivery followed by overnight next business day delivery to the Borrower at the address set forth above (or such other address as the Borrower may by notice to the Holder may designate from time to time) and to the Holder at the
address set forth above (or such other address as the Holder by notice to the Borrower may designate from time to time). Time shall be counted to, or from, as the case may be, the date of delivery. 

(j) The Company has agreed to pay to counsel to the Holder the reasonable legal fees incurred by the Holder, not to exceed an amount of
$5,000, in connection with the transactions contemplated by this Note. 
 [Signature Page Follows] 

  
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 IN WITNESS WHEREOF, the Borrower has caused this Note to be executed as of the Issuance Date.

  

			
	BORROWER:
	
	AUTHENTIDATE HOLDING CORP.
		
	By:		  

	Name:		Ian C. Bonnet
	Title:		Chief Executive Officer

  
 7EX-10.1

 Exhibit 10.1 

WARRANT AMENDMENT AGREEMENT 

This WARRANT AMENDMENT AGREEMENT (this “Amendment”), dated as of April 24, 2015 (the “Execution Date”),
is entered into by and among AUTHENTIDATE HOLDING CORP., a Delaware corporation (the “Company”) and LAZARUS INVESTMENT PARTNERS LLLP the holder (the “Holder”) of the Warrants (as such term is defined below). 

WHEREAS, the Company has issued to the Holder warrants to purchase shares of common stock of the Company on or about October 13, 2010
(the “October 2010 Warrants”), October 13, 2011 (the “October 2011 Warrants”), March 14, 2012 (the “March 2012 Warrants”), April 11, 2012 (the “April 2012 Warrants”),
in two issuances on September 28, 2012 (the “September 2012 Warrants”), June 11, 2013 (the “June 2013 Warrants”), and September 3, 2014 (the “September 2014 Warrants”) (collectively,
the “Warrants”); and 
 WHEREAS, in consideration of the Holder’s agreement to extend a loan of $500,000 to the
Company, the Company and Holder desire to amend the Warrants to reduce the exercise price and to extend the exercise period of such Warrants. 

NOW, THEREFORE, for valuable consideration, the receipt and sufficiency of which are hereby acknowledged the Company and the Holder agree as
follows: 
 SECTION 1. Definitions and Effectiveness. As used herein, terms that are defined herein shall have the meanings as
so defined, and terms not so defined shall have the meanings as set forth in the Warrants. With respect to the October 2010 Warrants, the October 2011 Warrants, the March 2012 Warrants, the April 2012 Warrants and the September 2012 Warrants, this
Amendment is effective on the Execution Date. With respect to the June 2013 Warrants and the September 2014 Warrants, this Amendment is effective on May 7, 2015. As used herein, (i) for the October 2010 Warrants, the October 2011 Warrants,
the March 2012 Warrants, the April 2012 Warrants and the September 2012 Warrants, the term “Effective Date” shall mean the Execution Date; and (ii) for the June 2013 Warrants and the September 2014 Warrants, the term
“Effective Date” shall mean May 7, 2015. 
 SECTION 2. Amendments to the Warrants. The Warrants shall be
amended as follows: 
 (a) The relevant section of each of the Warrants is hereby amended to modify the definition of the term
“Exercise Price” such that from and after the Effective Date of this Amendment, the term “Exercise Price” shall be as follows: 

“Exercise Price” means the price at which the Holder may purchase one share of Common Stock upon exercise of this Warrant as
determined from time to time pursuant to the provisions hereof. The initial Exercise Price is $0.25 per share, subject to adjustment as provided herein. 

(b) The relevant section of each of the Warrants is hereby amended to modify the definition of the term “Expiration
Date” such that from and after the Effective Date of this Amendment, the term “Expiration Date” shall be as follows: 

“Expiration Date” shall be October 25, 2019. 

SECTION 3. Effect of Amendments. Upon the Effective Date of this Amendment, (i) the applicable portions of this Amendment
shall be a part of each of the Warrants and each of the Warrants shall incorporate the provisions of Section 2 hereof which are applicable to such Warrants, and (ii) each reference in the Warrants to “this Warrant”,
“this Agreement”, “hereof”, “hereunder”, or words of like import, and each reference in any other document or agreement to the Warrants shall mean and be a reference to such Warrants as amended hereby. In the event of
any inconsistencies between this 

  
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Amendment and any of the Warrants, the terms of this Amendment shall govern. Except as expressly amended hereby, each of the Warrants, as amended hereby, shall remain in full force and effect and
is hereby ratified and confirmed by the parties hereto. Except as provided for herein, all other terms and conditions of the Warrants shall remain unchanged. The Holder and the Company hereby consents to the terms of the amendments to the Warrants
contained in this Amendment. 
 SECTION 4. Representations and Warranties. Each of the parties hereto represents and warrants
that it is duly incorporated or otherwise organized, validly existing and (to the extent applicable) in good standing under the laws of the jurisdiction of its formation, that it has all requisite power and authority to enter into this Amendment and
that this Amendment has been duly authorized, executed and delivered by it and constitutes its legal, valid and binding obligation. The Holder further represents and warrants that (i) it is the beneficial or record owner of each of the Warrants
originally issued to it, free and clear of any and all pledges, liens, security interests, mortgage, claims, charges, restrictions, options, title defects or encumbrances; (ii) such Holder has not assigned or transferred any interest in the
Warrants; (iii) it is an “accredited investor” as that term is defined in Regulation D promulgated under the Securities Act of 1933; (iv) it is holding the Warrants (and the shares of the Company’s common stock issuable
upon exercise thereof) for its own account for investment and not with a view toward distribution in a manner which would violate the Securities Act of 1933 or any applicable state securities laws; and (v) it is aware that the Warrants
(and the shares of the Company’s common stock issuable upon exercise thereof) are “restricted securities” under the federal securities laws and must be held indefinitely unless subsequently registered under the Securities Act of 1933
and under applicable state securities laws or an exemption from such registration is available. 
 SECTION 5. Governing Law;
Miscellaneous. 
 (a) This Amendment shall be governed by and construed in accordance with the laws of the State of New York without
reference to principles of conflicts of law. Headings used herein are for convenience of reference only and shall not affect the meaning of this Amendment. This Amendment may be executed in any number of counterparts, and by the parties hereto on
separate counterparts, each of which shall be an original and all of which taken together shall constitute one and the same agreement. Executed counterparts may be delivered via facsimile or other means of electronic transmission. 

(b) In the event one or more of the provisions of this Amendment should, for any reason, be held to be invalid, illegal or unenforceable in
any respect, such invalidity, illegality or unenforceability shall not affect any other provisions of this Amendment, and this Amendment shall be construed as if such invalid, illegal or unenforceable provision had never been contained herein. 

(c) This Amendment contains the entire agreement and understanding of the parties with respect to its subject matter and supersedes all prior
arrangements and understandings between the parties, either written or oral, with respect to its subject matter. No provision of this Amendment may be waived, modified, supplemented or amended except in a written instrument signed by the Company and
the Holder. The failure of any party at any time or times to require performance of any provision hereof shall in no manner affect the rights at a later time to enforce the same. No waivers of or exceptions to any term, condition, or provision of
this Amendment, in any one or more instances, shall be deemed to be, or construed as, a further or continuing waiver of any such term, condition, or provision. This Amendment shall be binding upon and shall inure to the benefit of and be binding
upon the parties hereto and their respective successors and assigns. 
 Signature page follows. 

  
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 WITNESS WHEREOF, the parties have caused this Amendment to be executed by their respective
duly authorized representatives, as of the Execution Date first set forth above 
  

			
	AUTHENTIDATE HOLDING CORP.
		
	By:		  

	Name:		Ian C. Bonnet
	Title:		Chief Executive Officer

  

			
	ACCEPTED AND AGREED:
	
	HOLDER:
	
	LAZARUS INVESTMENT PARTNERS LLLP
		
	By:		  

	Name:		
	Title:		

  
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