Material Event (Form 8-K)

On or about June 26, 2025, Citibank Credit Card Issuance Trust expects to issue a tranche of Notes of the Citiseries entitled 4.30% Class 2025-A1 Notes of June 2028 (Legal Maturity Date June 2030) in the principal amount of $1,250,000,000.

On the issuance date of the Class 2025-A1 Notes, the Issuing Entity will execute the Terms Document, which sets forth certain terms of the Class 2025-A1 Notes. An unexecuted copy of the Terms Document is attached hereto as Exhibit 4.1.

In connection with the issuance of the Class 2025-A1 Notes, the Chief Executive Officer of Citibank, N.A. has signed a Depositor Certification for Shelf Offerings of Asset-Backed Securities, dated June 18, 2025, which is attached hereto as Exhibit 36.1.