Teeny, tiny charges

How it works

Thieves get hold of your credit- or debit-card number and make very small charges of 20 cents to $10. The charges appear on your bill with an innocuous-sounding corporate name, and a toll-free number may appear next to the charge. But when you call the number, it's either disconnected or you're instructed to leave a message and your call is never returned.

That was precisely the scam that the Federal Trade Commission broke up in June, according to spokesman Frank Dorman. "We don't know where the thieves got the card numbers, but we're looking into that," he says. The scam was successful because most consumers either didn't notice the charges or didn't bother to correct them because the amounts were so small. In all, the crime ring racked up more than $10 million in bogus charges, the FTC estimates.

Prevent it

Scrutinize every item on your bill every month, and question those you don't recognize. (Some charges, but not all, will list a phone number.) If you think a charge is fraudulent, notify your card company as soon as possible but no later than 60 days after the charge appears. By law, the card company must remove the disputed amount from your account while it investigates. Worst case, by law you're liable for only the first $50 on a credit card. (In most cases, Visa and MasterCard will cover the full amount.) Debit cards offer fewer protections: You must report the problem two days after you notice it. If you don't, you could be liable for the first $500 in fraudulent charges. If you wait more than 60 days after your statement is mailed, you could lose all the money in your account.