from odoo import models class AccountMoveSend(models.AbstractModel): _inherit = 'account.move.send' def _get_mail_attachment_from_doc(self, doc): if doc.name == 'jsondump.json' and doc.edi_format_id.code == 'es_sii': return self.env['ir.attachment'] return super()._get_mail_attachment_from_doc(doc)