Do not pay an expired order to its old address. A payment window limits the validity of the price, inventory, and address; when it ends, the old quote may no longer represent an available resource.
Check the order status and request a new quote or create a new order. The new order may have a different amount, term, inventory status, and payment address. An old address must never be assumed to be valid for a new order.
If you already paid after expiry, save the transaction hash, order number, amount, and network and request manual reconciliation. Automatic matching is not guaranteed for an expired order.