Odoo-18.0-20251222/account_invoice_supplier_ref_unique/readme/DESCRIPTION.md

This module checks that a supplier invoice/refund is not entered twice. This is important because if you enter twice the same supplier invoice, there is also a risk that you pay it twice !

This module adds a constraint on supplier invoice/refunds to check that (commercial_partner_id, supplier_invoice_number) is unique, without considering the case of the supplier invoice number. To activate that feature:

• Go to Invoicing/Accounting > Configuration > Settings > Vendor Bills
• Check the 'Check Unicity on Supplier Invoice Number' box.