We are a contractor working in NY, but the administrative offices are in Georgia. Our customer(also a contractor) is requiring us to sign a unconditional waiver saying we have received the check although we do not have it in our hands. I have offered to send a conditional waiver to have them release the check followed up with the unconditional waiver after the check is received. They will only accept their waivers and say they don't have conditional ones. The contractor is willing to let us pick the check and exchange for the waiver at that time. However, we are in Georgia. Is this legal to not offer us a conditional waiver?