EX-4.1



 Exhibit 4.1 

CITIBANK CREDIT CARD ISSUANCE TRUST 

Citiseries 

Class 2017-A6 Notes 

Issuer Certificate 
 Pursuant to
Sections 202 and 301(h) of the Indenture 
 Reference is made to the Second Amended and Restated Indenture dated as of
September 26, 2000, as amended and restated as of August 9, 2011, and as further amended and restated as of November 10, 2016, between Citibank Credit Card Issuance Trust (the “Issuer”) and Deutsche Bank Trust Company Americas,
as trustee (as so further amended and restated, the “Indenture”). Capitalized terms used herein that are not otherwise defined have the meanings set forth in the Indenture. All references herein to designated Sections are to the designated
Sections of the Indenture. 
 Section 301(h) provides that the Issuer may from time to time create a tranche of Notes either by or pursuant
to an Issuer Certificate setting forth the principal terms thereof. Pursuant to this Issuer Certificate, there is hereby created a tranche of Notes having the following terms: 

Series Designation: Citiseries. This series is included in Group 1. 

Tranche Designation: $775,000,000 Floating Rate Class 2017-A6 Notes of May 2027 (Legal Maturity Date May
2029) (hereinafter, the “Class 2017-A6 Notes”) 
 Currency: The
Class 2017-A6 Notes will be payable, and denominated, in Dollars. 
 Denominations: The Class 2017-A6 Notes will be issuable in minimum denominations of $100,000 and multiples of $1,000 in excess of that amount. 

Issuance Date: May 22, 2017 
 Initial Principal
Amount: $775,000,000 
 Issue Price: 100% 

Interest Rate: The Class 2017-A6 Notes will accrue interest with respect to any interest period at a per
annum rate equal to the Class 2017-A6 Note Rate for such interest period, calculated on the basis of the actual number of days in such interest period divided by 360. The
“Class 2017-A6 Note Rate” means, with respect to the first interest period, 1.82562% per annum and, with respect to each interest period thereafter, a per annum rate equal to LIBOR for such
interest period plus 0.77%. 
 The Issuer will determine LIBOR for each applicable interest period on the second business day before the beginning of that
interest period. For purposes of calculating LIBOR, a business day is any day on which dealings in deposits in U.S. Dollars are transacted in the London interbank market. 







 “LIBOR” means, as of any date of determination, the rate for deposits in U.S. Dollars for the
Designated Maturity (commencing on the first day of the relevant interest period) which appears on the Reuters Screen LIBOR01 Page as of 11:00 a.m., London time, on such date. If such rate does not appear on the Reuters Screen LIBOR01 Page, the rate
for that day will be determined on the basis of the rates at which deposits in U.S. Dollars are offered by the Reference Banks at approximately 11:00 a.m., London time, on that day to prime banks in the London interbank market for the Designated
Maturity (commencing on the first day of the relevant interest period). The Issuer will request the principal London office of each of the Reference Banks to provide a quotation of its rate. If at least two such quotations are provided, the rate for
that day will be the arithmetic mean of the quotations. If fewer than two quotations are provided as requested, the rate for that day will be the arithmetic mean of the rates quoted by major banks in New York City, selected by the Issuer, at
approximately 11:00 a.m., New York City time, on that day for loans in U.S. Dollars to leading European banks for a period of the Designated Maturity (commencing on the first day of the relevant interest period). 

“Reuters Screen LIBOR01 Page” means the display page currently so designated on the Reuters Monitor Money Rates service (or such other page
as may replace that page on that service or any successor service for the purpose of displaying comparable rates or prices). 
 “Designated
Maturity” means one month. 
 “Reference Banks” means four major banks in the London interbank market selected by the Issuer. 

Scheduled Interest Payment Dates: The 14th day of each month, beginning July 2017. 

Each payment of interest on the Class 2017-A6 Notes will include all interest accrued from and including the
preceding Interest Payment Date — or, for the first interest period, from and including the Issuance Date — to and including the day preceding the current Interest Payment Date, plus any interest accrued but not previously paid. 

The first deposit targeted to be made to the Interest Funding sub-Account for the
Class 2017-A6 Notes will be on the July 13, 2017 Interest Deposit Date and in an amount equal to $2,082,981.71. 

Expected Principal Payment Date: May 14, 2027 
 Legal
Maturity Date: May 14, 2029 
 Monthly Principal Date: For the month in which the Expected Principal Payment Date occurs, May 14, 2027,
and for each other month, the 14th day of such month, or if such day is not a Business Day, the next following Business Day. 
 Required Subordinated
Amount of Class B Notes: $46,367,552.50 

  
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 Required Subordinated Amount of Class C Notes: $61,823,377.50 

Controlled Accumulation Amount: $64,583,333.33 
 Form
of Notes: The Class 2017-A6 Notes will be issued as Global Notes. The Global Notes will initially be registered in the name of Cede & Co., as nominee of The Depository Trust Company, and will
be exchangeable for individual Notes only in accordance with the provisions of Section 204(c). 
 Additional Issuances of Class 2017-A6 Notes: The Issuer may at any time and from time to time issue additional Class 2017-A6 Notes, subject to the satisfaction of (i) the conditions
precedent set forth in Section 311(a) and (ii) the following conditions: 
  

	 	(a)	The Issuer has obtained written confirmation from each Rating Agency that there will be no Ratings Effect with respect to the then outstanding Class 2017-A6 Notes as a result
of the issuance of such additional Class 2017-A6 Notes; 

  

	 	(b)	As of the date of issuance of the additional Class 2017-A6 Notes, all amounts due and owing to the Holders of the then outstanding
Class 2017-A6 Notes have been paid and there is no Nominal Liquidation Amount Deficit with respect to the then outstanding Class 2017-A6 Notes;


  

	 	(c)	The additional Class 2017-A6 Notes will be fungible with the original Class 2017-A6 Notes for federal income tax purposes;


  

	 	(d)	If Holders of the then outstanding Class 2017-A6 Notes have the benefit of a Derivative Agreement, the Issuer will have obtained a Derivative Agreement for the benefit of the
Holders of the additional Class 2017-A6 Notes; and 

  

	 	(e)	The ratio of the Controlled Accumulation Amount to the Initial Dollar Principal Amount of the Class 2017-A6 Notes, including the additional
Class 2017-A6 Notes, will be equal to the ratio of the Controlled Accumulation Amount (before giving effect to the additional issuance) to the Initial Dollar Principal Amount of the Class 2017-A6 Notes, excluding the additional Class 2017-A6 Notes. 


As of the date of issuance of additional Class 2017-A6 Notes, the Outstanding Dollar Principal Amount and Nominal
Liquidation Amount of the Class 2017-A6 Notes will be increased to reflect the Initial Dollar Principal Amount of the additional Class 2017-A6 Notes. 

Any outstanding Class 2017-A6 Notes and any additional Class 2017-A6
Notes will be equally and ratably entitled to the benefits of the Indenture without preference, priority or distinction. 
 Optional Redemption
Provisions other than Section 1202 “Clean-Up Call”: None 

  
 3 








 Additional Early Redemption Events or changes to Early Redemption Events: None 

Additional Events of Default or changes to Events of Default: None 

Business Day: means any day other than (a) a Saturday or Sunday or (b) any other day on which national banking associations or state banking
institutions in New York, New York or South Dakota, or any other state in which the principal executive offices of any Additional Seller are located, are authorized or obligated by law, executive order or governmental decree to be closed. 

Securities Exchange Listing: None 

  
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 The Class 2017-A6 Notes shall have such other terms
as are set forth in the form of Note attached hereto as Exhibit A. Pursuant to Section 202, the form of Note attached hereto has been approved by the Issuer. 

 

			
	CITIBANK CREDIT CARD ISSUANCE TRUST
	By	 	Citibank, N.A.,
		 	as Managing Beneficiary
	
	 /s/ Douglas C. Morrison

	Douglas C. Morrison
	Vice President


 Dated: May 22, 2017 

  
 5 








 Citiseries 

Class 2017-A6 Notes 

Reference is made to the resolutions adopted by the Board of Directors of Citibank, N.A. on January 25, 2017. The resolutions authorize
Citibank, N.A. from time to time to issue and sell, or to arrange for or participate in the issuance and sale of, one or more series and/or classes of pass-through certificates, participation certificates, commercial paper, notes, bonds or other
securities representing ownership interests in, or backed or secured by, pools of credit card receivables or interests therein (the “Receivables”) in an aggregate principal amount such that up to $45,000,000,000 of such certificates,
commercial paper, notes, bonds or other securities are outstanding at any one time and to sell, transfer, convey, assign or pledge or grant a security interest in all or any portion of its Receivables to Citibank Credit Card Master Trust I, Citibank
Omni Trust or any direct or indirect subsidiaries of Citibank, N.A., affiliates of Citigroup Inc., additional trusts or other entities or trustees in connection therewith on such terms as to be determined by the Citibank, N.A. Securitization Pricing
and Loan Committee (the “Pricing and Loan Committee”). 
 The undersigned, a duly authorized member of the Pricing and Loan
Committee, on behalf of such Pricing and Loan Committee, does hereby certify that the preceding Issuer Certificate, the terms of the tranche of Notes set forth in and to be created by the Issuer Certificate and the increase in the Invested Amount of
the Collateral Certificate resulting from the issuance of such Notes have been approved by such Pricing and Loan Committee. In addition, the following underwriting/selling agent terms with respect to this tranche of Notes have been approved by the
Pricing and Loan Committee: 
 Issue Price: 100% 

Underwriting Commission: 0.350% 

Proceeds to Issuer: 99.650% 

Representative of the Underwriters: Citigroup Global Markets Inc. 

The preceding Issuer Certificate and this certification of Pricing and Loan Committee approval shall be, continuously from the time of their
execution, official records of Citibank, N.A. 
  

	
	 /s/ Douglas C. Morrison

	Douglas C. Morrison
	Member of the Securitization Pricing and Loan Committee
	Citibank, N.A.

 Dated: May 22, 2017 

  
 6 








 Exhibit A 

FORM OF 
 CITISERIES 

FLOATING RATE CLASS 2017-A6 NOTES OF MAY 2027 

(Legal Maturity Date May 2029) 
  

					
	$[    ],000,000	 		  	REGISTERED
	CUSIP No. 17305E GE9	 		  	No. R-[1][2]

 UNLESS THIS NOTE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK
CORPORATION (“DTC”), TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY NOTE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE
OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE
REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. 
 THE PRINCIPAL OF THIS NOTE IS PAYABLE AS SET FORTH HEREIN AND IN THE
INDENTURE REFERRED TO BELOW. ACCORDINGLY, THE OUTSTANDING PRINCIPAL AMOUNT OF THIS NOTE AT ANY TIME MAY BE LESS THAN THE AMOUNT SHOWN ON THE FACE HEREOF. 

CITIBANK CREDIT CARD ISSUANCE TRUST 

CITISERIES 
 FLOATING RATE CLASS 2017-A6 NOTES OF MAY 2027 
 (Legal Maturity Date May 2029) 

CITIBANK CREDIT CARD ISSUANCE TRUST, a trust formed and existing under the laws of the State of Delaware (including any successor, the “Issuer”),
for value received, hereby promises to pay to CEDE & CO., or its registered assigns, the principal amount of [    ] HUNDRED MILLION DOLLARS ($[    ],000,000). The Expected Principal Payment Date for
this Note is May 14, 2027. The Legal Maturity Date for this Note is May 14, 2029. 
 The Issuer hereby promises to pay interest on this Note on
the 14th day of each month, beginning July 2017, until the principal of this Note is paid or made available for payment, subject to certain limitations set forth in the Indenture. Interest will accrue on the outstanding principal amount of this Note
for each interest period in an amount equal to the product of (i) the actual 







 
number of days in such interest period divided by 360, (ii) a rate per annum equal to the Class 2017-A6 Note Rate for such interest period, and
(iii) the outstanding principal amount of this Note as of the preceding Interest Payment Date (after giving effect to any payments of principal made on the preceding Interest Payment Date) or, with respect to the first Interest Payment Date,
the initial principal amount of this Note. The Class 2017-A6 Note Rate will be determined as provided in the Indenture. 

If any Interest Payment Date or Principal Payment Date of this Note falls on a day that is not a Business Day, the required payment of interest or principal
will be made on the following Business Day. 
 This Note is one of the Citiseries, Class 2017-A6 Notes issued
pursuant to the Second Amended and Restated Indenture dated as of September 26, 2000, as amended and restated as of August 9, 2011, and as further amended and restated as of November 10, 2016 (as so further amended and restated and
otherwise modified from time to time, the “Indenture”) between the Issuer and Deutsche Bank Trust Company Americas, as Trustee. For purposes of this Note, the term “Indenture” includes any supplemental indenture or Issuer
Certificate relating to the Citiseries, Class 2017-A6 Notes. This Note is subject to all of the terms of the Indenture. All terms used in this Note that are not otherwise defined herein and that are
defined in the Indenture will have the meanings assigned to them therein. 
 The principal of and interest on this Note are payable in such coin or currency
of the United States of America as at the time of payment is legal tender for payment of public and private debts. 
 Reference is made to the further
provisions of this Note set forth on the reverse hereof, which will have the same effect as though fully set forth on the face of this Note. 
 Unless the
certificate of authentication hereon has been executed by the Trustee whose name appears below by manual signature, this Note will not be entitled to any benefit under the Indenture, or be valid or obligatory for any purpose. 







 IN WITNESS WHEREOF, the Issuer has caused this instrument to be signed, manually or in facsimile, by an Issuer
Authorized Officer. 
  

					
	CITIBANK CREDIT CARD ISSUANCE TRUST
		
	By:	 	CITIBANK, N.A.,
		 	as Managing Beneficiary of
		 	Citibank Credit Card Issuance Trust
			
		 	By:	 	  

		 		 	Douglas C. Morrison
		 		 	Vice President


 Dated: May 22, 2017 

TRUSTEE’S CERTIFICATE OF AUTHENTICATION 

This is one of the Notes designated above and referred to in the within mentioned Indenture. 

 

			
	DEUTSCHE BANK TRUST COMPANY AMERICAS, as Trustee under the Indenture
		
	By:	 	  

		 	Authorized Signatory


 Dated: May 22, 2017 







 REVERSE OF NOTE 

This Note is one of a duly authorized issue of Notes of the Issuer, designated as its Citiseries Floating Rate
Class 2017-A6 Notes of May 2027 (Legal Maturity Date May 2029) (herein called the “Notes”), all issued under an Indenture, to which Indenture reference is hereby made for a statement of the
respective rights and obligations thereunder of the Issuer, the Trustee and the Holders of the Notes. 
 This Note ranks pari passu with all other
Class A Notes of the same series, as set forth in the Indenture. This Note is secured to the extent, and by the collateral, described in the Indenture. 

The Issuer will pay interest on overdue interest as set forth in the Indenture to the extent lawful. 

Each Holder by acceptance of this Note, and each owner of a beneficial interest in this Note by acceptance of a beneficial interest in this Note, agrees that
no recourse may be taken, directly or indirectly, with respect to the obligations of the Issuer or the Trustee on the Notes, against the Issuer, the Issuer Trustee, Citibank, N.A., the Trustee or any affiliate, officer, employee or director of any
of them, and the obligation of the Issuer to pay principal of or interest on this Note or any other amount payable to the Holder of this Note will be subject to Article V of the Indenture. 

Each Holder by acceptance of this Note, and each owner of a beneficial interest in this Note by acceptance of a beneficial interest in this Note, in each case
other than Citibank, N.A. as Holder or owner, agrees that this Note is intended to be debt of Citibank, N.A. for federal, state and local income and franchise tax purposes, and agrees to treat this Note accordingly for all such purposes, unless
otherwise required by a taxing authority. 
 Each Holder by acceptance of this Note, and each owner of a beneficial interest in this Note by acceptance of a
beneficial interest in this Note, agrees that it will not at any time institute against the Issuer, or join in any institution against the Issuer of, any bankruptcy, reorganization, arrangement, insolvency or liquidation proceeding, or other
proceedings under any United States federal or state bankruptcy or similar law in connection with any obligations relating to this Note, the Indenture or any Derivative Agreement. 

This Note and the Indenture will be construed in accordance with and governed by the laws of the State of New York. 

Certain amendments may be made to the Indenture without the consent of the Holder of this Note. This Note must be surrendered for final payment of principal
and interest. 







 ASSIGNMENT 

Social Security or taxpayer I.D. or other identifying number of
assignee:                                       
                      
 FOR VALUE RECEIVED, the
undersigned hereby sells, assigns and transfers unto 
  

					
		 	  
	 	
			
		 	  
	 	
	(name and address of assignee)

 the within Note and all rights thereunder, and hereby irrevocably constitutes and appoints
                            , attorney, to transfer said Note on the books kept for registration thereof,
with full power of substitution in the premises. 
  

									
	Dated:	 	  
	 		 	  
	 	*
		 		 		 	Signature Guaranteed:	 	

  
  

	*	NOTE: The signature to this assignment must correspond with the name of the registered owner as it appears on the face of the within Note in every particular without alteration, enlargement or any change whatsoever.