Update 42.md

Co-authored-by: Ricardo Arturo Cabral Mejía <me@ricardocabral.io>

1 files changed, 3 insertions, 1 deletions

diff --git a/42.md b/42.md
index 93bb3e3..9b0c45b 100644
--- a/42.md
+++ b/42.md
@@ -35,7 +35,9 @@ And, when sent by clients, of the following form:
 ```
 
 The signed event is an ephemeral event not meant to be published or queried, it must be of `kind: 22242` and it should have at least two tags,
-one for the relay URL and one for the challenge string as received from the relay. `created_at` should be the current time. Example:
+one for the relay URL and one for the challenge string as received from the relay.
+Relays MUST exclude `kind: 22242` events from being broadcasted to any client.
+`created_at` should be the current time. Example:
 
 ```json
 {