Georgia Interim Waiver and Release upon payment

I've never had to deal with a Georgia waiver before. We have a customer who is wanting us to do these waivers on jobs that I just billed them for and no payments have been made. The wording at the end of the waiver is unclear to us and we need to know what happens if we sign this waiver but don't end up getting paid? The wording is this: Notice: When you execute and submit this document, you shall be conclusively deemed to have been paid in full the amount stated above, even if you have not actually received such payment, 60 days after the date stated above unless you file either an affidavit of nonpayment or a claim of lien prior to the expiration of such 60 day period. If we haven't been paid anything yet, should we be signing a waiver that has this wording on it? Please advise