Criminal impersonation charges are serious, and can occur in a variety of scenarios. For example, if you are contacted by the police and lie about your identity, that often constitutes criminal impersonation; or, claiming to be married to someone who knows nothing about you being married to them also would be criminal impersonation.
However, not every time sometimes lies about or misstates their identity will that constitute criminal impersonation. For there to be criminal impersonation, the accused must not only have assumed a false identity, but in that capacity also have obtained some kind of benefit or have actually injured or defrauded someone.
Criminal impersonation is a class 6 felony.