diff --git a/Friendica-API.md b/Friendica-API.md
index 15d8fd9..fc81498 100644
--- a/Friendica-API.md
+++ b/Friendica-API.md
@@ -15,6 +15,9 @@ Please refer to the linked documentation for further information.
 * include_rts: Retweets in friendica are implemented in a different way
 * include_my_retweet: Retweets in friendica are implemented in a different way
 
+#### Different behaviour
+* screen_name: The nick name is not unique. This means that use of this parameter is a problem.
+
 ### account/verify_credentials
 #### Parameters
 * skip_status