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): January 1, 2016

51-0020270

(IRS Employer Identification No. of

the sponsor)

47-4047337

(IRS Employer Identification No. of

the depositor)

(302) 323-7315

(Telephone, including area code)

Former name or former address, if changed since last report: Not Applicable

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:

On January 1, 2016, the Receivables Sale and Contribution Agreement, dated as of December 22, 2015, between Discover Bank and Discover Funding LLC, became effective pursuant to its terms. A copy of the Receivables Sale and Contribution Agreement was filed as Exhibit 4.1 to the Current Report on Form 8-K on December 23, 2015.

On January 1, 2016, the Third Amended and Restated Pooling and Servicing Agreement, dated as of December 22, 2015, among U.S. Bank National Association, as trustee (the “Master Trust Trustee”), Discover Funding LLC and Discover Bank, became effective pursuant to its terms. A copy of the Third Amended and Restated Pooling and Servicing Agreement was filed as Exhibit 4.2 to the Current Report on Form 8-K on December 23, 2015.

On January 1, 2016, the Amended and Restated Series Supplement, dated as of December 22, 2015, among the Master Trust Trustee, Discover Funding LLC and Discover Bank, became effective pursuant to its terms. A copy of the Amended and Restated Series Supplement was filed as Exhibit 4.3 to the Current Report on Form 8-K on December 23, 2015.

On January 1, 2016, the Amended and Restated Indenture, dated as of December 22, 2015, between Discover Card Execution Note Trust (the “Note Issuance Trust”), as Issuer, and U.S. Bank National Association, as Indenture Trustee (the “Indenture Trustee”), became effective pursuant to its terms. A copy of the Amended and Restated Indenture was filed as Exhibit 4.4 to the Current Report on Form 8-K on December 23, 2015.

On January 1, 2016, the Second Amended and Restated Indenture Supplement, dated as of December 22, 2015, between the Note Issuance Trust, as Issuer, and the Indenture Trustee, became effective pursuant to its terms. A copy of the Second Amended and Restated Indenture Supplement was filed as Exhibit 4.5 to the Current Report on Form 8-K on December 23, 2015.

On January 1, 2016, the Amended and Restated Trust Agreement, dated as of December 22, 2015, between Wilmington Trust Company, as owner trustee, and Discover Funding LLC, as beneficiary, became effective pursuant to its terms. A copy of the Amended and Restated Trust Agreement was filed as Exhibit 4.6 to the Current Report on Form 8-K on December 23, 2015.

SIGNATURES

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

Date: January 4, 2016