I'd encourage any lab to establish the correct wording that is legally binding to their state. I've had this happen to me, and I had to take it to small claims in the state where the lab was. (Va.) It is where I am. The wording needs to spell out your ( the Lab's) terms on the back of each and every work authorization form, and when payment is expected, and the ramifications if the bill isn't paid on time.
Now granted..... enforcing this with a standing account can be tricky. Maybe most of you give the dentist full net 30 days. I don't.
Say you give them net 25 days from the date of statement, and if payment is not received in lab by the 25th, then you charge them a 2% finance charge. This is your legal recourse, not necessarily written in stone. If they are a good account, pay close to being on time, no worries, but should you have to go to court, the judge is going to ask you what your terms were. Most of the time, they will never read the back of the script, and they pay basically when they pay.
I re-iterate this is for legal purposes. You and I both know that if you tell a dentist they owe a finance charge, they'll drop you like a bad habit.
But, for sure if the porcelain supplier in New York wants their money on the 25th, and you don't pay the 12.00 you owe them, they will add a finance charge. It seems to be the thinking of some dentists that they will pay you when they are ready. They'll tell you collections are slow.
Most of my accounts get pre-authorization from most of the insurance companies, or get an up front fee to do the crown. Let that go to the lab. Another thing..... paying every 30 days is still........... wait for it.......... paying every 30 days. What's the problem?
In summary, have your work authorizations read what the payment terms are, who it applies to (all associates, etc.),and should they use any other form in substitution of your lab slips make mention that your lab slip terms still apply and they, by sending you the case, agree to the terms.
Today, for example, I received a check from a client that was $600.00 short of what it should have been for 3 associates in that practice. Now, Monday, I will have to call the "office person", and listen to some excuse (right, wrong, or indifferent) as to what the hell happened! I should NEVER have to call a dentist, and I don't care how big or small the practice is, to get paid.
We run a business, and not some hobby shop! End of story.
The drawback is this: if you piss them off, their ego will never allow them to return, so be prepared to walk on eggshells.
If you have enough work to cut them loose, and it is a big enough pain for you, I'd say cut them loose, but know full well, you may never hear from them again.
I'd rather be happy than right.