We thank you for using Citibank Online.

If you need assistance or simply have questions,
contact us using any of the following options:

For your credit card account:
Call the Citi ThankYou Preferred Servicing Center at 1-800-THANKYOU
(1-800-842-6596)(toll-free) or visit

For credit card collections:
Call 1-800-926-1058 or 1-877-792-8215 (toll-free)

For your personal loan account:
Email us at
Call 1-800-922-6235 (TTY: Call 711)

For your mortgage account:
Call Customer Service at 1-800-283-7918 (toll-free)
Monday-Friday 8:00am-10:00pm ET and Saturday 8:00am-6:00pm ET or visit

If you need to write us, or for all other matters, our mailing address is:
Citibank, N.A.
P.O. Box 6771
Sioux Falls, SD 57117