Citi starts closing Mastercards without warning: People across country reporting their cards linked to gas companies denied

MSNBC NEW YORK - Shannon Burdette tried to pay with her Shell Mastercard after filling up her gas tank this weekend but found the card rejected. Confused, she called the customer service line on the back of the card, issued by Citibank, and was told the account was closed because of something that appeared on her credit report. But when the Sykesville, Md., resident got a copy of her credit report online, the only negative thing she saw was "closed at credit grantor's request" on the Shell Ma