I was wondering what all of you do as far as CYA when it comes to having a customer not pay, or argue about price after the job is complete. It hasn't happened to me yet, but I'm sure it will. I have the customer sign and date the project proposal, collect half the money up front when possible, and take before and after pictures to doccument my work.
What is sufficient doccumentation if you have to go to court? What other creative methods have you used to avoid that?