diff --git a/fsm_visit_confirmation/models/project_task.py b/fsm_visit_confirmation/models/project_task.py
index 3e29fc8..d7f283d 100644
--- a/fsm_visit_confirmation/models/project_task.py
+++ b/fsm_visit_confirmation/models/project_task.py
@@ -13,9 +13,11 @@ class ProjectTask(models.Model):
 
         # If stage changed and new stage has an approval template, send the email
         if "stage_id" in vals:
+            # Only send email for top-level tasks
             for task in self.filtered(
                 lambda task: task.stage_id != old_stages[task.id]
                 and task.stage_id.approval_template_id
+                and not task.parent_id
             ):
                 task._portal_ensure_token()
                 task.stage_id.approval_template_id.send_mail(