diff --git a/02.md b/02.md
index 2822803f..e1e56d08 100644
--- a/02.md
+++ b/02.md
@@ -9,6 +9,8 @@ Contact List and Petnames
 A special event with kind `3`, meaning "contact list" is defined as having a list of `p`, `t`, `r`, `e` or `a` tags, one for each of the profiles, hashtags and other events such as communities or chats one is following.
 
 Each `p` tag entry should contain the key for the profile, a relay URL where events from that key can be found (can be set to an empty string if not needed), and a local name (or "petname") for that profile (can also be set to an empty string or not provided), i.e., `["p", <32-bytes hex key>, <main relay URL>, <petname>]`. The `content` can be anything and should be ignored.
+	
+Clients are not expected to support all types of follows, but MUST not delete unsupported tags when updating the contact list. 
 
 For example: