By default, Request Finance assigns invoice numbers automatically at the moment an invoice is created. The numbering continues from your last invoice in sequence, starting at 1. If you manually enter a custom invoice number, the next automatically numbered invoice will pick up where the regular sequence left off.
However, this can sometimes leave gaps in your sequence if invoices are created but never paid. To prevent this, you can enable “Invoice Numbering After Payment” in Settings > Product Settings.
When enabled:
Newly created invoices receive a pro forma number visible to you and your client.
Once the invoice is paid, it is assigned the next official invoice number in your sequence, following the last paid invoice.
Paid invoices will continue to have a pro forma number for your reference.
This ensures a continuous, gap-free numbering sequence for your paid invoices.