diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index faadbc0da0f..dbcb5c78d5b 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -5479,12 +5479,12 @@ function getCommonSubstitutionArray($outputlangs, $onlykey=0, $exclude=null, $ob
 			$substitutionarray['__MEMBER_PHONEPRO__']=$msgishtml?dol_htmlentitiesbr($object->phone_perso):$object->phone_perso;
 			$substitutionarray['__MEMBER_PHONEMOBILE__']=$msgishtml?dol_htmlentitiesbr($object->phone_mobile):$object->phone_mobile;
 
-			if ($object->element == 'societe')
+			if (is_object($object) && $object->element == 'societe')
 			{
 				$substitutionarray['__THIRDPARTY_ID__'] = (is_object($object)?$object->id:'');
 				$substitutionarray['__THIRDPARTY_NAME__'] = (is_object($object)?$object->name:'');
 			}
-			if (is_object($object->thirdparty) && $object->thirdparty->id > 0)
+			elseif (is_object($object->thirdparty) && $object->thirdparty->id > 0)
 			{
 				$substitutionarray['__THIRDPARTY_ID__'] = (is_object($object->thirdparty)?$object->thirdparty->id:'');
 				$substitutionarray['__THIRDPARTY_NAME__'] = (is_object($object->thirdparty)?$object->thirdparty->name:'');