Is using a forged Social Security Number -- but your own name -- to obtain employment or buy a car an identity theft crime? Lately, U.S. courts are saying it's not.

The most recent judicial body to take on the issue, the Colorado Supreme Court, ruled last month that a man who used his real name but someone else's Social Security number to obtain a car loan was not guilty of "criminal impersonation," overturning convictions by lower courts.