diff --git a/specification/paths/Returns-v1-returns.json b/specification/paths/Returns-v1-returns.json
index bdfb0d47..1d27affe 100644
--- a/specification/paths/Returns-v1-returns.json
+++ b/specification/paths/Returns-v1-returns.json
@@ -29,6 +29,14 @@
           "type": "string"
         }
       },
+      {
+        "name": "filter[postal_code]",
+        "in": "query",
+        "description": "Postal code of the consumer_address of the return.",
+        "schema": {
+          "type": "string"
+        }
+      },
       {
         "name": "filter[search]",
         "in": "query",