diff --git a/docs/public-launch-checklist.md b/docs/public-launch-checklist.md
index 9acd65c..0af18f3 100644
--- a/docs/public-launch-checklist.md
+++ b/docs/public-launch-checklist.md
@@ -188,8 +188,14 @@ as forward-only rather than receiving an invented database rollback.
 
 - [x] Public HTTPS home, liveness, readiness, WebSocket upgrade, manifest, and
       `assetlinks.json` return the expected production identity.
-- [ ] Registration, returning-user login, and settings linking complete against
-      the production Google OAuth client and exact callback origin.
+- [ ] A new account completes Google registration against the production OAuth
+      client and exact callback origin.
+- [x] A linked returning account completes Google sign-in against the production
+      OAuth client and exact callback origin. The real browser flow returned the
+      established account to the application with the `Welcome back!` result;
+      the runtime client ID and callback match the production Cloud client.
+- [ ] An existing signed-in account links Google from settings against the
+      production OAuth client and exact callback origin.
 - [x] A production-generated authentication email reaches an external mailbox
       and is DKIM-signed by the production domain.
 - [x] Authentication-email action URLs use the production domain directly.
diff --git a/docs/verification.md b/docs/verification.md
index a9aaeee..c2c827c 100644
--- a/docs/verification.md
+++ b/docs/verification.md
@@ -3765,6 +3765,23 @@ promoted.
   shared Caddy configuration, or public Git remote was changed by these
   checks.
 
+# 2026-08-26 production Google and Play identity recheck
+
+- Read-only Google Cloud inspection found the production Web OAuth client with
+  authorized origin `https://whoneedhelp.com` and callback
+  `https://whoneedhelp.com/auth/google/callback`. The running production release
+  used the same client ID and public endpoint identity.
+- A read-only production database query found one account and one Google auth
+  identity for the established operator account. Provider UID and credential
+  values were not printed. Together with the headed production callback replay
+  recorded on 2026-08-25, this closes the returning-account sign-in gate. It
+  does not prove a new production Google registration or settings-originated
+  linking flow, so those remain separate unchecked launch gates.
+- The connected physical phone still reported `org.whoneedhelp.mobile` version
+  `0.1.3 (4)` installed by `com.android.vending`. No package, permission, Play
+  track, production service, frozen hackathon test deployment, shared Caddy
+  configuration, or public Git remote was changed by this recheck.
+
 # 2026-08-25 anonymous production support verification and cleanup
 
 - One uniquely addressed anonymous `account_access` request was submitted to