If you have a Citi Bank card, you should read this:

"During routine monitoring, we recently discovered unauthorized access to Citi's account online," said Citigroup, in a prepared statement. "A limited number -- roughly 1 percent - of Citi bankcard customers' accounting information (such as name, account number and contact information including email address) was viewed."

According to its annual report, Citigroup has about 21 million credit card accounts in North America, where the breach occurred.

The statement went on to say that the customers' Social Security numbers, dates of birth, card expiration dates and card security codes "were not compromised."

Citigroup said it was contacting the affected customers and had "implemented enhanced procedures to prevent a recurrence of this type of event."

This is the latest bit of bad news for Citigroup, as the company's stock has plunged a whopping 15 percent over the last month due to uncertainty about the impact of the Wall Street reform law.

They may not have your PIN number but they certainly have enough information to create another identification. If you haven't invested in a credit score monitoring site yet, you might want to think about it (some credit cards offer a free look at one of the Big Three credit reporting agencies).

ID theft can cause you a lot of headaches. But if you catch it quickly, it's a lot less painful.