Here's the question really quick:
I have a character in Brooklyn (that is, New York City), in 1999, who wants to teach martial arts/self-defense. She's got madcrazy skills, so that's not the problem.
The problem comes in at the fact that all her identification papers are (very well-done) fakes.
So what does she need to do to teach, and how much should she be worrying over her false identity she has set up?