The Sunoco credit card is issued in partnership with Citibank, and you will interact with Citi to pay your bill online or by mail, or to get customer service help. All of the information you need to complete any of these tasks:
- To pay your Sunoco credit card bill online, log in to your account here and make a payment.
You can also pay your Sunoco credit card bill by mail. Send your payment to the following address:
Sunoco Credit Card
P.O. Box 78056
Phoenix, AZ 85062-8056
If you are having trouble making a payment, or if you need other assistance, the Sunoco / Citi credit card customer service phone number is 1-866-622-3574.