Fix allow_mail_archived_partner causing system notifications to send emails

allow_mail_archived_partner/models/account_move_send.py

@@ -7,7 +7,7 @@ from odoo import models, api, fields
 class AccountInvoiceSend(models.TransientModel):
     _inherit = "account.invoice.send"
 
-    # Allow archived partners to stay visible in the wizard
+    # Allow archived partners to remain selectable
     partner_ids = fields.Many2many(
         'res.partner',
         string='Recipients',
@@ -34,17 +34,19 @@ class AccountInvoiceSend(models.TransientModel):
 
     def action_send_and_print(self):
         """
-        Explicitly rebuild recipients from partner_ids to avoid
-        Odoo silently skipping send when archived partners are used.
+        Explicitly set email_to on the wizard record.
+        This is REQUIRED for account.invoice.send.
         """
         self.ensure_one()
 
-        # Build email_to explicitly
         emails = [p.email for p in self.partner_ids if p.email]
         if not emails:
             _logger.warning("No recipient emails found; skipping send.")
             return {'type': 'ir.actions.act_window_close'}
 
+        # 🔥 THIS is the critical line
+        self.email_to = ",".join(emails)
+
         return super(
             AccountInvoiceSend,
             self.with_context(
@@ -53,6 +55,5 @@ class AccountInvoiceSend(models.TransientModel):
                 mail_notify_force=True,
                 force_email=True,
                 mark_invoice_as_sent=True,
-                email_to=",".join(emails),
             )
         ).action_send_and_print()