How bad is the relationship already?<p>Personally, I wouldn't burn a bridge with a client who could either return later or pass along some word of mouth, for $1200. If the relationship is already spoiled to the point that you don't think either of those things might happen, I would just explain to the customer that you can't afford to do any more work without payment, and then walk away. Don't retaliate/do additional work to turn off the site or whatever, just literally walk away from it as is.<p>If you still have a decent relationship, I would just explain to them that you have $1200 into the project, and you understand where he is coming from, but would really appreciate it if he could do better by you. If he returns with a negative, say thanks, and please pass along any other opportunities, give him whatever access he needs and walk away.<p>Retaliating in any way isn't going to get you paid, it just will spoil your reputation, which is worth alot more than $1200. Even if you are right and he is wrong, if he happens to be at a bar with someone and that person mentions they are having you do some work for them, whether he responds with "Oh yeah, he is a decent guy" or "Oh man, did he burn me once" could make a difference.<p>Life lesson the hard way.