diff --git a/addons/account/wizard/account_move_send.py b/addons/account/wizard/account_move_send.py
index 1b959a67655..21403052b71 100644
--- a/addons/account/wizard/account_move_send.py
+++ b/addons/account/wizard/account_move_send.py
@@ -467,7 +467,7 @@ class AccountMoveSend(models.Model):
 
         mail_attachments = [
             (attachment.name, attachment.raw)
-            for attachment in self.env['ir.attachment'].browse(list(seen_attachment_ids))
+            for attachment in self.env['ir.attachment'].browse(list(seen_attachment_ids)).exists()
         ]
 
         return {