How to Detect a Genuine Priest From a Fake Priest

If i was a catholic abducted by a government as a dissident, how do i who's moving the document on me? And if he is aa impostor, and i don't know that, am i to believe that my confession was valid? If you have perfect contrition for your sins, where you turn away from your sins, because you recognize god as infinitely good, you are already reconciled with him by that fact. So even though the priest couldn't validly absolve you, you might be reconciled with god simply through the exercise of attempting to confess.