So it’s the person you’re suing. Essentially, it’s a civil case like a car accident, but you’re suing someone for going into the wrong bathroom. You’re guaranteed a $10k judgement but can get more for “emotional damages” if the judge is a particular bigot.

Edit: it also means you can blackmail a trans person for a settlement and that’s legal too, since the threat isn’t so much the criminal fine but the civil one