diff --git a/api/v2.0.0/beckn.yaml b/api/v2.0.0/beckn.yaml
index 85727e24..0a87fcec 100644
--- a/api/v2.0.0/beckn.yaml
+++ b/api/v2.0.0/beckn.yaml
@@ -2988,8 +2988,15 @@ components:
             \ transaction is occurring. Actors use this value to resolve the subnet's\
             \ registry URL before performing identity and address lookups. The RECOMMENDED\
             \ format is namespace_id followed by a slash followed by registry_id, for\
-            \ example acmenet.org/charge-net."
-          type: string
+            \ example acmenet.org/charge-net. Accepts either a single string or an\
+            \ array of strings to support multi-network scoping."
+          oneOf:
+            - type: string
+            - type: array
+              items:
+                type: string
+              minItems: 1
+              uniqueItems: true
         timestamp:
           description: The date and time at which this message was generated by the
             sender, expressed in RFC 3339 date-time format. The receiving actor MAY