This is one main reason that places are being scrutinized and closed down, even the legit OPs are having problems with the people who decide they want to be drug dealers.
With the use of a scanner and software, documents can be falsified, Any OP, or private citizen could unknowingly be a victim of fraud.
Still, always consult an attorney to avoid entrapment. You can be completely innocent and by answering LE's questions, end up in the slammer wondering "what happened?"