If the payment process is interrupted for any reason, it may happen that items of a guest account are allocated to an invoice number, but payment for the same not being possible.
There are two ways to find this out:
1. The account still shows a debit, however, if you are trying to settle, the message There are no postings to be settled is displayed.
2. The invoice overview shows an invoice with different amounts for payment and invoice.
There are two ways to solve this problem:
1. Cancel the invoice in the invoice overview. You will be able to settle the account as usual.
2. Settle the account and press the button outstanding invoices in the settlement profile. Select the incomplete invoice and settle the account as usual.