In the episode "Rick Potion #9", an alternative Rick managed to save the world from the love potion but died soon afterwards due to a freak accident.
Rick and Morty C-147 had come in and take their place. The episode ends with Rick and Morty, burying their dead bodies in the backyard.
Now the next bit requires a bit of imagination; If a cop or a government official or etc, found out Rick is in fact not the "real" Rick Sanchez and lets imagine that Rick is taken to court (even though its likely he would just decline and end up killing a bunch of people) and or Gerry decides to take Rick to court (because Gerry naturally hates Rick) could he be charged on the grounds of impersonation?
According to "The Legal Dictionary"; The (crime) impersonation is:
The crime of pretending to be another individual in order to deceive others and gain some advantage.
Rick is impersonating his alternative self to take advantage of their dimension because their original one got destroyed and he deceives his own family in order to live their pretending to be the "original" Rick and Morty.
Now the difficult bit is, could Rick be charged with impersonating his alternative self? or is it out of the jurisdiction or power of the law to determine such things?