Identity theft is when a criminal acquires and uses a person's personal information and then uses that information to, in a sense, becomes that person for a while.
The most common uses of identity theft are credit card and check fraud. Some other uses that can occur are illegal immigration, blackmail, crime or just attacking an individual for revenge.
Identity theft can really destroy someone's life for months or even years. The most common result is destruction of credit.
People often get credit cards and open bank accounts in the victims name and buy all kinds of expensive merchandise they can either keep or sell for cash.
This 46 page book will identify various types of identity theft and ways you can protect yourself.