This invoice allows the party who provided said goods/services to remind the client that they still have a balance owing from a previous order. A remaining balance due invoice should provide a summary of the order, and it should include the total amount owed for the order, the total amount already paid, and the remaining amount owed. The collector may wish to provide a payment due date to encourage the client to pay the full remaining amount (or just a partial payment) in a timely manner.