If you suspect that your personal information has been used to commit fraud or theft, take the following four steps right away. Follow up all calls in writing; send your letter by certified mail, and request a return receipt, so you can document what the company received and when; and keep copies for your files.

Place a fraud alert on your credit reports and review your credit reports. Contact any one of the nationwide consumer reporting companies to place a fraud alert on your credit report. Fraud alerts can help prevent an identity thief from opening any more accounts in your name. The company you call is required to contact the other two, which will place an alert on their versions of your report, too.

Equifax: 1-800-525-6285

Experian: 1-888-EXPERIAN (397-3742)

TransUnion: 1-800-680-7289

In addition to placing the fraud alert on your file, the three consumer reporting companies will send you free copies of your credit reports, and, if you ask, they will display only the last four digits of your Social Security number on your credit reports.

Close the accounts that you know, or believe, have been tampered with or opened fraudulently.

Contact the security or fraud department of each company where you know, or believe, accounts have been tampered with or opened fraudulently. Follow up in writing, and include copies (NOT originals) of supporting documents. It's important to notify credit card companies and banks in writing. Send your letters by certified mail, return receipt requested, so you can document what the company received and when. Keep a file of your correspondence and enclosures.

When you open new accounts, use new Personal Identification Numbers (PINs) and passwords. Avoid using easily available information like your mother's maiden name, your birth date, the last four digits of your Social Security number or your phone number, or a series of consecutive numbers.

File a report with your local police or the police in the community where the identity theft took place.

Get a copy of the police report or, at the very least, the number of the report. It can help you deal with creditors who need proof of the crime. If the police are reluctant to take your report, ask to file a "Miscellaneous Incidents" report, or try another jurisdiction, like your state police. You also can check with your state Attorney General's office to find out if state law requires the police to take reports for identity theft. Check the Blue Pages of your telephone directory for the phone number or check www.naag.org for a list of state Attorneys General.

File a complaint with the Federal Trade Commission.

By sharing your identity theft complaint with the FTC, you will provide important information that can help law enforcement officials across the nation track down identity thieves and stop them. The FTC also can refer your complaint to other government agencies and companies for further action, as well as investigate companies for violations of laws that the FTC enforces.

You can file a complaint with the FTC's Identity Theft Hotline, toll-free: 1-877-IDTHEFT (438-4338); TTY: 1-866-653-4261; or write: Identity Theft Clearinghouse, Federal Trade Commission, 600 Pennsylvania Avenue, NW, Washington, DC 20580.