diff --git a/htdocs/webservices/server_supplier_invoice.php b/htdocs/webservices/server_supplier_invoice.php
index 507095ac78b..8ba70409806 100644
--- a/htdocs/webservices/server_supplier_invoice.php
+++ b/htdocs/webservices/server_supplier_invoice.php
@@ -329,7 +329,6 @@ function getSupplierInvoice($authentication, $id = '', $ref = '', $ref_ext = '')
  * @param	array		$authentication		Array of authentication information
  * @param	int			$idthirdparty		Id thirdparty
  * @return	array							Array result
- *
  */
 function getSupplierInvoicesForThirdParty($authentication, $idthirdparty)
 {
diff --git a/htdocs/webservices/server_thirdparty.php b/htdocs/webservices/server_thirdparty.php
index d7ded82cc3f..c81b6bc6f63 100644
--- a/htdocs/webservices/server_thirdparty.php
+++ b/htdocs/webservices/server_thirdparty.php
@@ -298,14 +298,16 @@ function getThirdParty($authentication, $id = '', $ref = '', $ref_ext = '')
 
 	// Init and check authentication
 	$objectresp = array();
-	$errorcode = ''; $errorlabel = '';
+	$errorcode = '';
+	$errorlabel = '';
 	$error = 0;
 	$fuser = check_authentication($authentication, $error, $errorcode, $errorlabel);
 	// Check parameters
 	if (!$error && (($id && $ref) || ($id && $ref_ext) || ($ref && $ref_ext)))
 	{
 		$error++;
-		$errorcode = 'BAD_PARAMETERS'; $errorlabel = "Parameter id, ref and ref_ext can't be both provided. You must choose one or other but not both.";
+		$errorcode = 'BAD_PARAMETERS';
+		$errorlabel = "Parameter id, ref and ref_ext can't be both provided. You must choose one or other but not both.";
 	}
 
 	if (!$error)
@@ -316,8 +318,7 @@ function getThirdParty($authentication, $id = '', $ref = '', $ref_ext = '')
 		{
 			$thirdparty = new Societe($db);
 			$result = $thirdparty->fetch($id, $ref, $ref_ext);
-			if ($result > 0)
-			{
+			if ($result > 0) {
 				$thirdparty_result_fields = array(
 						'id' => $thirdparty->id,
 			   			'ref' => $thirdparty->name,
@@ -380,8 +381,10 @@ function getThirdParty($authentication, $id = '', $ref = '', $ref_ext = '')
 				$objectresp = array(
 					'result'=>array('result_code'=>'OK', 'result_label'=>''),
 					'thirdparty'=>$thirdparty_result_fields);
-			}
-			else {
+			} elseif ($result == -2) {
+				$error++;
+				$errorcode = 'DUPLICATE_FOUND'; $errorlabel = 'Object found several times for id='.$id.' or ref='.$ref.' or ref_ext='.$ref_ext;
+			} else {
 				$error++;
 				$errorcode = 'NOT_FOUND'; $errorlabel = 'Object not found for id='.$id.' nor ref='.$ref.' nor ref_ext='.$ref_ext;
 			}