diff --git a/account_credit_control/wizard/credit_control_communication.py b/account_credit_control/wizard/credit_control_communication.py
index 08936486b..f007589c6 100644
--- a/account_credit_control/wizard/credit_control_communication.py
+++ b/account_credit_control/wizard/credit_control_communication.py
@@ -81,7 +81,10 @@ class CreditCommunication(models.TransientModel):
         """ Return a valid email for customer """
         self.ensure_one()
         contact = self.contact_address
-        return contact.email
+        email = contact.email
+        if not email and contact.commercial_partner_id.email:
+            email = contact.commercial_partner_id.email
+        return email
 
     @api.multi
     @api.returns('res.partner')