diff --git a/security-cases/nk-synthetic-journey.yaml b/security-cases/nk-synthetic-journey.yaml
index d7f9587..a11be3d 100644
--- a/security-cases/nk-synthetic-journey.yaml
+++ b/security-cases/nk-synthetic-journey.yaml
@@ -1,4 +1,4 @@
-# KeyCape client for the synthetic MFA journey (NK-WP-0056-T09). Proposed: no acceptance yet.
+# KeyCape client for the synthetic MFA journey (NK-WP-0056-T09). Accepted by the founder 2026-10-31.
 # Public PKCE client; the redirect URI is never served: the runner reads the code from the
 # Location header. mfa_required pins MFA, and the runner also requests acr urn:netkingdom:aal2.
 # access_groups is required by the type; synthetic-journey has no members and no service maps it.
@@ -7,7 +7,13 @@ kind: SecurityCase
 spec:
   id: nk-synthetic-journey
   type: oidc-browser-relying-party@1.1
-  status: proposed
+  status: accepted
+  acceptance:
+    at: "2026-10-31"
+    record: "Founder accepted the case as proposed in session 2026-10-31 (NK-WP-0056-T09; hub decision 91323969; CCR-2026-0057 approved railiance-platform 2ac9786)"
+    by:
+      - {role: owner, name: founder}
+      - {role: founder, name: founder}
   owner:
     repo: net-kingdom
     person: founder