diff --git a/easy_my_coop/models/coop.py b/easy_my_coop/models/coop.py
index a8ba624..23bad29 100644
--- a/easy_my_coop/models/coop.py
+++ b/easy_my_coop/models/coop.py
@@ -699,10 +699,17 @@ class SubscriptionRequest(models.Model):
         if self.is_company and not partner.has_representative():
             contact = False
             if self.email:
-                domain = [("email", "=", self.email)]
+                domain = [("email", "=", self.email),
+                          ('company_type', '=', 'person')]
                 contact = partner_obj.search(domain)
-                if contact:
+                if len(contact) < 2:
                     contact.type = "representative"
+                else:
+                    raise UserError(
+                        _(
+                            "You have duplicate contact with email %s" % self.email
+                        )
+                    )
             if not contact:
                 contact_vals = self.get_representative_vals()
                 partner_obj.create(contact_vals)