diff --git a/htdocs/fourn/commande/list.php b/htdocs/fourn/commande/list.php
index 23fc14c332c..38de1e3854a 100644
--- a/htdocs/fourn/commande/list.php
+++ b/htdocs/fourn/commande/list.php
@@ -493,6 +493,10 @@ if (empty($reshook)) {
 
 					for ($i = 0; $i < $num; $i++) {
 						$desc = ($lines[$i]->desc ? $lines[$i]->desc : $lines[$i]->libelle);
+						// If we build one invoice for several supplier orders, append the source order reference on the invoice line.
+						if (!empty($createbills_onebythird)) {
+							$desc = dol_concatdesc($desc, $langs->trans("SupplierOrder").' '.$cmd->ref.' - '.dol_print_date($cmd->date, 'day'));
+						}
 						if ($lines[$i]->subprice < 0) {
 							require_once DOL_DOCUMENT_ROOT.'/core/class/discount.class.php';
 
diff --git a/htdocs/societe/class/api_thirdparties.class.php b/htdocs/societe/class/api_thirdparties.class.php
index e9aaef56d25..599567772cb 100644
--- a/htdocs/societe/class/api_thirdparties.class.php
+++ b/htdocs/societe/class/api_thirdparties.class.php
@@ -1080,7 +1080,7 @@ class Thirdparties extends DolibarrApi
 		}
 
 		$result = $this->company->fetch($id);
-		if (!is_array($result)) {
+		if ($result <= 0) {
 			throw new RestException(404, 'Thirdparty not found');
 		}