diff --git a/addons/project/data/project_mail_template_data.xml b/addons/project/data/project_mail_template_data.xml
index d6cd9e4ce4b..bc96d795102 100644
--- a/addons/project/data/project_mail_template_data.xml
+++ b/addons/project/data/project_mail_template_data.xml
@@ -38,7 +38,11 @@
     <table border="0" cellpadding="0" cellspacing="0" width="590" style="width:100%; margin:0px auto;">
     <tbody>
         <tr><td valign="top" style="font-size: 13px;">
-            Hello ${partner.name},<br/><br/>
+            % if partner.name:
+                Hello ${partner.name},<br/><br/>
+            % else:
+                Hello,<br/><br/>
+            % endif
             Please take a moment to rate our services related to the task "<strong>${object.name}</strong>"
             % if object.rating_get_rated_partner_id().name:
                 assigned to <strong>${object.rating_get_rated_partner_id().name}</strong>.<br/>