As of 2015, CITGO does not have an in-person payment option, according to CITGO. The company accepts credit card payments online, by phone or by mail. Credit cards are managed by Citigroup, and payment options are accessible through the company's online account management system.
A payment received via telephone encounters an additional fee, says CITGO. There is no fee to utilize the online account management service to pay off a balance or to pay the minimum amount due.
Store locations are searchable on the company's website to find nearby CITGO gas stations that accept the company-branded credit cards. Pay-at-the-pump is an in-person feature along with nationwide ATMs that offer cash withdrawals.