# Unique Supplier Invoice Number in Invoice

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.

Table of contents

- Bug Tracker
- Credits
  - Authors
  - Contributors
  - Maintainers

# Bug Tracker

Bugs are tracked on GitHub Issues. In case of trouble, please check there if your issue has already been reported. If you spotted it first, help us to smash it by providing a detailed and welcomed feedback.

Do not contact contributors directly about support or help with technical issues.

# Credits

## Authors

- Savoir-faire Linux
- Acsone SA/NV

## Contributors

- Marc Cassuto <marc.cassuto@savoirfairelinux.com>
- Mathieu Benoit <mathieu.benoit@savoirfairelinux.com>
- Alexis de Lattre <alexis.delattre@akretion.com>
- Thomas Binsfeld <thomas.binsfeld@acsone.eu>
- Andrea Stirpe <a.stirpe@onestein.nl>
- Miguel Gandia <miguel@studio73.es>
- Juany Davila <juany.davila@forgeflow.com>

## Maintainers

This module is maintained by the OCA.

OCA, or the Odoo Community Association, is a nonprofit organization whose mission is to support the collaborative development of Odoo features and promote its widespread use.

This module is part of the OCA/account-invoicing project on GitHub.

You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.