Searched and didn't see this issue referenced. I use the short version of my name professionally and personally, including on credit cards and other banking; the more formal version is for TSA and other legal. AA.com wants the formal first name for security purposes and I've never had a problem with that. That coexistence just hit a wall. While buying a ticket online this week I got repeated error messages telling me the name on my credit card and security information — i.e., how my first name is expressed — have to match. I had to call to buy the ticket over the phone. The AA CSR told me she's been hearing about this problem recently. I tried the AA X (Twitter) team, which is usually pretty responsive, but they ducked the issue. Anyone else experienced this? I'm not going to change the name on my credit cards. The alternative is... Delta?