BO297 said:
Are they close by? I find the best way on amounts like that is to drive over and ask for the money face to face. If they say they don't have the full amount, take a smaller payment and go back a week to 10 days later for another payment. It's not fun but sometimes that's what it takes.
People can blow you off in emails and phone calls. It's hard to not pay something when I am in your office.
This. I'm in outside sales, and about once a quarter I have to visit a customer who wont pay their bills. It's amazing how apologetic they are when you are standing in their lobby. I used to dread those visits, but they really aren't so bad. About 75% of the time I leave with a check in my hand, or a signed agreement for a payment plan.