Why is my Citibank credit card payment not going through

There are a few reasons why your Citibank credit card payment might not be working. Sometimes, it could be that your card has expired or isn't activated yet. You might have also reached your credit limit, which is like a spending cap. Citi also has security measures in place, so if they suspect anything unusual, they might flag a transaction. When you're paying online, it's really important to make sure all the details like the card number, expiration date, and security code are correct. Even an old billing address can cause a problem. Sometimes, it's just a small technical glitch, and trying again might work! If you're still having trouble, it's best to contact Citibank directly.