diff --git a/loopback/locale/es.json b/loopback/locale/es.json
index 81a75c0cc..664a3cf0e 100644
--- a/loopback/locale/es.json
+++ b/loopback/locale/es.json
@@ -291,5 +291,6 @@
 	"comercialId": "Id comercial",
 	"comercialName": "Comercial",
 	"Invalid NIF for VIES": "Invalid NIF for VIES",
-	"Ticket does not exist": "Este ticket no existe"
+	"Ticket does not exist": "Este ticket no existe",
+    "Ticket is already signed": "Este ticket ya ha sido firmado"
 }