UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): July 16, 2018

Commission File Number of Issuing Entity: 000-20787-07

Central Index Key Number of Issuing Entity: 0001003509

AMERICAN EXPRESS CREDIT ACCOUNT MASTER TRUST

(Exact Name of Issuing Entity as Specified in its Charter)

Commission File Number of Depositor/Registrant: 333-113579-02

Central Index Key Number of Depositor/Registrant: 0001283434

AMERICAN EXPRESS RECEIVABLES FINANCING CORPORATION III LLC

(Exact Name of Depositor/Registrant as Specified in its Charter)

4315 South 2700 West, Room 1100

Mail Stop 02-01-46

Salt Lake City, Utah 84184

(801) 945-5648

(Address, Including Zip Code, and Telephone Number, Including Area Code, of the Registrant’s Principal

Executive Office)

N/A

(Former Name or Former Address, if Changed Since Last Report)

Central Index Key Number of Sponsor:

0000949348

AMERICAN EXPRESS NATIONAL BANK

(Exact Name of Sponsor as Specified in its Charter)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions.

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

INFORMATION TO BE INCLUDED IN THE REPORT

Item 8.01. Other Events.

On July 16, 2018, American Express Receivables Financing Corporation III LLC (“RFC III”) (the “Transferor”), American Express National Bank (“AENB”), and American Express Travel Related Services Company, Inc. (“TRS”) entered into an Underwriting Agreement (the “Series 2018-6 Underwriting Agreement”) with Barclays Capital Inc., Mizuho Securities USA LLC and RBC Capital Markets, LLC, as representatives of the several underwriters (collectively, the “Underwriters”), with respect to the issuance and sale of Class A 3.06% Asset Backed Certificates, Series 2018-6 (the “Series 2018-6 Class A Certificates”), expected to be issued by the American Express Credit Account Master Trust (the “Trust”) on or about July 23, 2018 (the “Closing Date”). The Trust is also expected to issue the Class B 3.25% Asset Backed Certificates, Series 2018-6 (the “Series 2018-6 Class B Certificates” and, together with the Series 2018-6 Class A Certificates, the “Series 2018-6 Certificates”) on the Closing Date, which will be purchased directly by an affiliate of the Transferor. The Series 2018-6 Underwriting Agreement is attached hereto as Exhibit 1.1.

On July 16, 2018, the Transferor, AENB and TRS entered into an Underwriting Agreement (the “Series 2018-7 Underwriting Agreement”) with the Underwriters with respect to the issuance and sale of Class A Floating Rate Asset Backed Certificates, Series 2018-7 and the Class B Floating Rate Asset Backed Certificates, Series 2018-7 (together, the “Series 2018-7 Certificates”), expected to be issued by the Trust on the Closing Date. The Series 2018-7 Underwriting Agreement is attached hereto as Exhibit 1.2.

The Series 2018-6 Certificates and the Series 2018-7 Certificates are collectively referred to herein as the “Certificates.”

On the Closing Date, the Trust will supplement its Fourth Amended and Restated Pooling and Servicing Agreement, dated as of April 1, 2018, as amended from time to time (the “Pooling and Servicing Agreement”), with its Series 2018-6 Supplement, to be dated as of the Closing Date (the “Series 2018-6 Supplement”). An unexecuted copy of the Series 2018-6 Supplement is attached hereto as Exhibit 4.1.

On the Closing Date, the Trust will supplement the Pooling and Servicing Agreement with its Series 2018-7 Supplement, to be dated as of the Closing Date (the “Series 2018-7 Supplement”). An unexecuted copy of the Series 2018-7 Supplement is attached hereto as Exhibit 4.2.

In connection with the offering of the Certificates, the chief executive officer of the Transferor has made the certifications required by Paragraph I.B.1(a) of Form SF-3 attached hereto as Exhibit 36.1 (with respect to Series 2018-6) and Exhibit 36.2 (with respect to Series 2018-7). The certifications are being filed on this report to satisfy the requirements of Item 601(b)(36) of Regulation S-K.

Copies of the opinions of Orrick, Herrington & Sutcliffe LLP with respect to legality of the Certificates and certain federal tax matters, together with related consents of Orrick, Herrington & Sutcliffe LLP to the incorporation by reference of such opinions as exhibits to the Registration Statement, are also filed as Exhibits 5.1, 8.1, 23.1 and 23.2 (with respect to Series 2018-6) and Exhibits 5.2, 8.2, 23.3 and 23.4 (with respect to Series 2018-7) to this Report.

Item 9.01. Exhibits.

The following are filed as Exhibits to this Report under Exhibit 1, Exhibit 4 and Exhibit 36:

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: July 17, 2018