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Citi ThankYou® Mastercard®

Contact us by phone.

1-800-669-8488

24 hours a day, 7 days a week

Additional Phone Numbers

Technical Assistance
1-800-815-7701
For TTY: Use 711 or other Relay Service
Outside the U.S., Canada and Puerto Rico, Phone Number
1-208-822-0001

Citi ThankYou® Mastercard®

General Inquiries
P.O. Box 6275
Sioux Falls, SD 57117

Contact us by mail.

Payment Addresses

Citi ThankYou® Mastercard® Payments
PO Box 70604
Philadelphia, PA 19176-0604

Citi ThankYou® Mastercard® Overnight Delivery/Express Payments
Attn: Consumer Payment Dept.
400 White Clay Center Drive
Newark, DE 19711