Considering Methods of Payment. Review credit card offers, compare rates and features or login to manage your existing Citi credit card … Visit a local Western Union and request the Quick Collect/Quick Pay service for Citi cards. Learn about Citi credit cards that provide credit card rewards programs such as ThankYou ® Rewards, AAdvantage ® miles, or cash back! With the 24-hour phone number, you can also make a payment by phone if necessary. Step. Provide the Western Union representative with your 16-digit account number and a cash payment to cover your transfer. Citibank, N.A. Pay your Citibank Credit Card / Ready Credit bills from your non-Citibank account almost instantly via FAST (Fast And Secure Transfers). Customers can also opt for a one-time online bill payment, enroll in auto bill pay or contact a Citibank representative via telephone to make a payment. Monday, July 18, 2016. Compare Credit Cards for Features that Matter the Most to You. Citibank credit card customers can pay their bill by sending a check or money order via mail. Secure Sign-on Editorial Note: The content of this article is based on the author’s opinions and recommendations alone. Step. Thank You Points cannot be used for bill payments toward any accounts with Citibank or a Citibank affiliate or for express or recurring payments. Online Bill Pay With Points lets you use the ThankYou ® Points you've already earned toward your bill payments. Provide the banker with the amount you are requesting to transfer, and your Citi card's 16-digit account number. eBills lets you receive, view and manage your bills on Citi Online. Credit Cards How to Make a Payment on Your Citi Costco Credit Card. Sign-on to manage your Citi Cards account online. You can pay bills, organize multiple Citibank credit cards, view statements, check due dates, and more. LEARN MORE; Citibank SMS Pay. As with other types of credit cards, you can't pay your Citibank GTCC card using a credit or debit card. Whether you pay via Citibank online, by mail or by phone, you'll need to use a valid checking account to make your payment. Advertiser Disclosure. Using your non-Citibank account, you can pay your Citibank Credit Card / Ready Credit bills with a simple SMS.