Target officials say about 40 million credit and debit card accounts may have been affected by a data breach.
If you're one of the millions of Americans wondering what to do next, Jessie Schmidt from the Better Business Bureau, has some advice.
Schmidt says if you used a credit or debit card at the retail chain in the past few weeks, don't panic. You will not be liable for any fraudulent charges on your account.
She says be sure to monitor your statements carefully. If you see a fraudulent charge, report it to your bank or credit card company right away.
Another suggestion Schmidt passes along is to keep your receipts in case you need to prove which charges you authorized and which ones you did not.
Target is also in the process of notifying banks and credit card companies, who will in turn notify anyone who is affected.
The accounts impacted are those of customers who swiped their cards at stores in the U.S. between November 27 and December 15.