We don't do work with folks with a past due invoice. It works well. We can't engage on the next engagement until you pay the prior. The folks who slow pay are

We don't do work with folks with a past due invoice. It works well. We can't engage on the next engagement until you pay the prior. The folks who slow pay are a paint to deal with overall I've found, so no big loss when they go. Or you don't get paid, which is even worse! And yes, they will slow pay anyone who lets them.