diff --git a/59.md b/59.md
index 1bcb8f1e..e08e5635 100644
--- a/59.md
+++ b/59.md
@@ -48,7 +48,7 @@ Tags MUST always be empty.
 
 The inner event MUST always be unsigned.
 
-To increase privacy, `.created_at` MAY not be accurate. 
+To increase privacy, `.created_at` MAY not be accurate. The `extension` tag can be used to minimize the existence of the event after a certain date. 
 
 ## The Gift Wrap Event Kind
 
@@ -68,7 +68,7 @@ A `gift wrap` event is a `kind:1059` event that wraps any other event. `tags` SH
 
 `.content` contains the cyphertext of the [NIP-44](44.md) encryption of the JSON-encoded event. 
 
-To increase privacy, `.created_at` MAY not be accurate. 
+To increase privacy, `.created_at` MAY not be accurate. The `extension` tag can be used to minimize the existence of the event after a certain date. 
 
 Relays SHOULD only serve `kind 1059` events intended for the marked recipient based on user AUTH.