My first post on SOT. This one hits close to home with me. I was very patient with AD. They were months behind for years, but the volume of work was so high, I let it slide. Toward the end I was personally assured by Skip that I would be made whole within three months. I received one more check and it bounced.  Other Syracuse clients recommended a local firm that specialized in collections. I was advised by that firm not to waste my time, that I was too far down the list.  The very expensive lesson I took from this episode was to be vigilant from the beginning. Do not let any client, no matter how large, be casual with your invoices. The day may (will) come when you're left holding a big bag of zeros.