diff --git a/docs/INTEGRATION_GUIDE.md b/docs/INTEGRATION_GUIDE.md
index a448be0..5c027ee 100644
--- a/docs/INTEGRATION_GUIDE.md
+++ b/docs/INTEGRATION_GUIDE.md
@@ -137,6 +137,7 @@ try {
 `UserInfoException` with `invalid_token` can occur when provider-side subject scope is no longer active (for example user/project disabled) between token issuance and userinfo retrieval.
 `TokenExchangeException` with `invalid_grant` can also occur when provider-side client/user/project state is inactive at exchange time.
 Provider login/authorization steps can also fail with `access_denied` when account status is disabled before completion.
+WebAuthn-based login verification can return credential-style failures for disabled accounts even when authenticator assertions are otherwise valid.
 
 ## Operational guidance