Car keys are not typically considered a form of identification. Also, the laws against identity theft do not always (ever?) reference the victim's knowledge.

Car keys are not typically considered a form of identification. Also, the laws against identity theft do not always (ever?) reference the victim's knowledge. In California, if you impersonate someone and profit as a result, you are guilty of false impersonation. The law doesn't care if the person you're impersonating knows.