Purchase Self Invoice

This module adds a self-billing workflow for vendor bills. On a supplier's contact record, in the Accounting tab, a new "Self Billing" section lets you switch on "Approves Self Billing", set an optional partner prefix, and create the missing numbering sequences with one button. A footer text for the self-bill report can also be set there.

On a vendor bill or vendor credit note, a "Set Self Invoice" checkbox appears when the supplier approves self-billing and is ticked by default. A banner warns that the invoice will generate a new self-bill number. When the bill is confirmed, Odoo takes the next number from the supplier's self-bill sequence (a separate refund sequence for credit notes), writes it into the bill reference and into a dedicated self-bill number field. If no invoice date was entered, today's date is used.

In Accounting settings, under vendor bills, you define the default self-bill prefix used when a new sequence is created; without it, creating a sequence raises an error. Sequences are built from the company prefix, the optional partner prefix, INV or RINV, and the year.

Self-bills print with a special layout: the supplier's address and logo replace your company's, the title becomes "Self-bill Invoice" or "Self-bill Credit Note", the self-bill number is shown, and the footer displays the partner's self-bill footer (default "Invoiced by the recipent"). Unposted self-bills are marked as not valid. A dedicated email template sends the self-bill to the supplier, and a "Self Invoices" filter is available in the invoice list.