Foreign companies that trade with non-enterprises in the EU may have a VATIN starting with "EU" instead of a country code. Currently, the user is facing a traceback in this situation since stdnum doesn't have any format method for vat number starting with 'EU'. closes odoo/odoo#93536 Ticket: 2877716 X-original-commit: 0f9f8409b379e3a0af28cecd3ed26829b9b26032 Signed-off-by: Olivier Colson (oco) <oco@odoo.com> Signed-off-by: Laurent Smet <las@odoo.com>