You can easily mark multiple due bills as paid in the Moon invoice by following the steps below.

1. Open the Moon Invoice application on your device or tap on this link.
2. From the main menu on your left, go to Purchase → Bills.
3. Now, click on the Edit Icon and select Due bills.
4. Now, click on the Payment Icon → Mark as Paid → Select Payment Method.
5. After that, your due invoices are marked as paid.