All very good advice here, and you're not alone in having this problem. In fact,...

gargravarr on Sept 11, 2015 | parent | context | favorite | on: Ask HN: I'm being stiffed by a client. What are my...

All very good advice here, and you're not alone in having this problem. In fact, there's a whole site dedicated to it, mostly for entertainment, but also some tidbits of advice here and there:

http://clientsfromhell.net/Deadbeat%20Clients