diff --git a/README.md b/README.md
index 468b6b9..87996f1 100644
--- a/README.md
+++ b/README.md
@@ -135,6 +135,7 @@ This wrapper now delegates to `BlackWall\Auth\AuthClient`.
 - Use OAuth/portal authentication endpoints for end users; provider admin login endpoints enforce separate admin scope checks.
 - For provider admin enrollment URL export operations, use `POST` with CSRF protection; do not automate them via unauthenticated `GET` links.
 - Handle provider CSV exports with formula-injection safety in mind if opening them in spreadsheet applications.
+- Treat generated enrollment URLs as secrets and keep them out of URL query strings and request logs.
 - Never place client secrets, refresh tokens, or access tokens in URL query strings.
 - For OIDC providers, include a per-request `nonce` in authorisation requests.
 - For direct Cryptbin API usage, send `key_b64url` on unwrap calls; provider rejects key-mismatch unwrap attempts with `403 Forbidden`.
diff --git a/docs/INTEGRATION_GUIDE.md b/docs/INTEGRATION_GUIDE.md
index 58b2484..468f06b 100644
--- a/docs/INTEGRATION_GUIDE.md
+++ b/docs/INTEGRATION_GUIDE.md
@@ -154,6 +154,7 @@ Provider user/project assignment views may exclude disabled projects even if his
 - If you call provider WebAuthn login challenge/verify endpoints directly, use `POST` only.
 - Treat admin enrollment URL export as a state-changing operation: call it with `POST` and include a valid CSRF token.
 - Treat provider CSV exports as untrusted input in spreadsheet tools; prefer importing into systems that neutralise formula cells.
+- Treat enrollment URLs as sensitive bearer material: do not place them in redirect query parameters, logs, or analytics tags; keep them in one-time server-side flash/session state.
 - Configure OAuth client redirect URIs as HTTPS in production; reserve HTTP for localhost loopback testing only.
 - Assume provider rate limits are enforced per source identity (for example IP) and shared across related auth endpoints.
 - Treat report/export-style provider endpoints as high-cost and expect stricter rate limits.