diff --git a/CHANGELOG.md b/CHANGELOG.md
index 09a1c7ef..e2203831 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,17 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/).
 
 ## [Unreleased]
 
+### Notices
+
+- **Federation IaC bundles downloaded before 2026-04-22 need to be
+  re-downloaded** to get zero-touch registration. Older bundles silently
+  skip auto-registration unless manually edited (Terraform `registration.tf`
+  gated `do_register` on `cudly_api_url`; CLI shell scripts included the
+  registration call only when `CUDlyAPIURL` was present at render time;
+  CloudFormation deploy scripts had no registration call at all).
+  Re-download the bundle from the CUDly UI and the new copy will register
+  your account automatically with no manual edits required.
+
 ### Fixed
 
 - Remove debug console.log from frontend recommendation handler