Each Contracted Works has its own Payment Window, which is set by the Project Owner.
The Payment Window opens on the date payment certificates are issued, and closes on the final payment due date. You must complete your Payment Breakdown while the Payment Window is open.
If you have more than one Contracted Works, each will have its own Payment Window. They might open and close at different times depending on how the Project has been set up. The Saible app will keep you notified.