diff --git a/src/pages/[platform]/build-a-backend/data/customize-authz/index.mdx b/src/pages/[platform]/build-a-backend/data/customize-authz/index.mdx
index 63c53d6d369..947ce934a85 100644
--- a/src/pages/[platform]/build-a-backend/data/customize-authz/index.mdx
+++ b/src/pages/[platform]/build-a-backend/data/customize-authz/index.mdx
@@ -218,6 +218,12 @@ do {
 
 </InlineFilter>
 
+<Callout info>
+
+**Note**: Authorization rules are only supported on data models (model-level and field-level) and custom operations (queries, mutations and subscriptions). They are not fully supported on custom types.
+
+</Callout>
+
 ## Learn more about specific authorization strategies
 
 <Overview childPageNodes={props.childPageNodes} />