diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index c3417702c6a..7c314c08be1 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -6119,25 +6119,25 @@ function getCommonSubstitutionArray($outputlangs, $onlykey = 0, $exclude = null,
 
 			if (is_object($object) && $object->element == 'adherent' && $object->id > 0)
 			{
-				$substitutionarray['__MEMBER_ID__'] = $object->id;
+				$substitutionarray['__MEMBER_ID__'] = (isset($object->id) ? $object->id : '');
 				if (method_exists($object, 'getCivilityLabel')) $substitutionarray['__MEMBER_CIVILITY__'] = $object->getCivilityLabel();
-				$substitutionarray['__MEMBER_FIRSTNAME__'] = $object->firstname;
-				$substitutionarray['__MEMBER_LASTNAME__'] = $object->lastname;
+				$substitutionarray['__MEMBER_FIRSTNAME__'] = (isset($object->firstname) ? $object->firstname : '');
+				$substitutionarray['__MEMBER_LASTNAME__'] = (isset($object->lastname) ? $object->lastname : '');
 				if (method_exists($object, 'getFullName')) $substitutionarray['__MEMBER_FULLNAME__'] = $object->getFullName($outputlangs);
-				$substitutionarray['__MEMBER_COMPANY__'] = $object->societe;
-				$substitutionarray['__MEMBER_ADDRESS__'] = $object->address;
-				$substitutionarray['__MEMBER_ZIP__'] = $object->zip;
-				$substitutionarray['__MEMBER_TOWN__'] = $object->town;
-				$substitutionarray['__MEMBER_COUNTRY__'] = $object->country;
-				$substitutionarray['__MEMBER_EMAIL__'] = $object->email;
-				$substitutionarray['__MEMBER_BIRTH__'] = $birthday;
-				$substitutionarray['__MEMBER_PHOTO__'] = $object->photo;
-				$substitutionarray['__MEMBER_LOGIN__'] = $object->login;
-				$substitutionarray['__MEMBER_PASSWORD__'] = $object->pass;
-				$substitutionarray['__MEMBER_PHONE__'] = $object->phone;
-				$substitutionarray['__MEMBER_PHONEPRO__'] = $object->phone_perso;
-				$substitutionarray['__MEMBER_PHONEMOBILE__'] = $object->phone_mobile;
-				$substitutionarray['__MEMBER_TYPE__'] = $object->type;
+				$substitutionarray['__MEMBER_COMPANY__'] = (isset($object->societe) ? $object->societe : '');
+				$substitutionarray['__MEMBER_ADDRESS__'] = (isset($object->address) ? $object->address : '');
+				$substitutionarray['__MEMBER_ZIP__'] = (isset($object->zip) ? $object->zip : '');
+				$substitutionarray['__MEMBER_TOWN__'] = (isset($object->town) ? $object->town : '');
+				$substitutionarray['__MEMBER_COUNTRY__'] = (isset($object->country) ? $object->country : '');
+				$substitutionarray['__MEMBER_EMAIL__'] = (isset($object->email) ? $object->email : '');
+				$substitutionarray['__MEMBER_BIRTH__'] = (isset($birthday) ? $birthday : '');
+				$substitutionarray['__MEMBER_PHOTO__'] = (isset($object->photo) ? $object->photo : '');
+				$substitutionarray['__MEMBER_LOGIN__'] = (isset($object->login) ? $object->login : '');
+				$substitutionarray['__MEMBER_PASSWORD__'] = (isset($object->pass) ? $object->pass : '');
+				$substitutionarray['__MEMBER_PHONE__'] = (isset($object->phone) ? $object->phone : '');
+				$substitutionarray['__MEMBER_PHONEPRO__'] = (isset($object->phone_perso) ? $object->phone_perso : '');
+				$substitutionarray['__MEMBER_PHONEMOBILE__'] = (isset($object->phone_mobile) ? $object->phone_mobile : '');
+				$substitutionarray['__MEMBER_TYPE__'] = (isset($object->type) ? $object->type : '');
 				$substitutionarray['__MEMBER_FIRST_SUBSCRIPTION_DATE__']       = dol_print_date($object->first_subscription_date, 'dayrfc');
 				$substitutionarray['__MEMBER_FIRST_SUBSCRIPTION_DATE_START__'] = dol_print_date($object->first_subscription_date_start, 'dayrfc');
 				$substitutionarray['__MEMBER_FIRST_SUBSCRIPTION_DATE_END__']   = dol_print_date($object->first_subscription_date_end, 'dayrfc');