Check your monthly statements and verify all withdrawals.

FORBES: How To Avoid Being A Victim Of Financial Fraud

The most important precaution is to check the statements for your debit and credit cards regularly for any unauthorized charges.

FORBES: Protecting Yourself From Online Hackers

As the author of "Your Evil Twin: Behind the Identity Theft Epidemic, " Sullivan shreds check statements and never answers e-mail solicitations.

NPR: Identification Theft: Protecting Your Personal Data