What Are Identity Theft and Identity Fraud?

"But he that filches from me my good name/Robs me of that which not enriches him/And makes me poor indeed."
- Shakespeare, Othello, act iii. Sc. 3.

The short answer is that identity theft is a crime. Identity theft and identity fraud are terms used to refer to all types of crime in which someone wrongfully obtains and uses another person's personal data in some way that involves fraud or deception, typically for economic gain. These Web pages are intended to explain why you need to take precautions to protect yourself from identity theft. Unlike your fingerprints, which are unique to you and cannot be given to someone else for their use, your personal data ­ especially your Social Security number, your bank account or credit card number, your telephone calling card number, and other valuable identifying data ­ can be used, if they fall into the wrong hands, to personally profit at your expense. In the United States and Canada, for example, many people have reported that unauthorized persons have taken funds out of their bank or financial accounts, or, in the worst cases, taken over their identities altogether, running up vast debts and committing crimes while using the victims's names. In many cases, a victim's losses may include not only out-of-pocket financial losses, but substantial additional financial costs associated with trying to restore his reputation in the community and correcting erroneous information for which the criminal is responsible.

What are the Most Common Ways To Commit Identity Theft or Fraud?

Many people do not realize how easily criminals can obtain our personal data without having to break into our homes. In public places, for example, criminals may engage in "shoulder surfing" ­ watching you from a nearby location as you punch in your telephone calling card number or credit card number ­ or listen in on your conversation if you give your credit-card number over the telephone to a hotel or rental car company.
If you receive applications for "pre-approved" credit cards in the mail, but discard them without tearing up the enclosed materials, criminals may retrieve them and try to activate the cards for their use without your knowledge. (Some credit card companies, when sending credit cards, have adopted security measures that allow a card recipient to activate the card only from his or her home telephone number but this is not yet a universal practice.) Also, if your mail is delivered to a place where others have ready access to it, criminals may simply intercept and redirect your mail to another location.

Taken from:
 http://www.justice.gov/criminal-fraud/identity-theft/identity-theft-and-identity-fraud