Check if a supplier invoice was created before to avoid duplicates
Check if the amount total is zero and in that case doesnt let you Validate de invoice.
Check and Giro module by Alphasoft.
Cheque followup as PDC/CDC/Direct Payment/Advance payment
Payment Acquirer: Cielo Integration With Odoo
Invoicing, Number, Cancelled
Intégration des codes d'activité algériens.