diff --git a/messages-uploaded-to-mailbox-correctly.md b/messages-uploaded-to-mailbox-correctly.md
index 42a184f..a60c51d 100644
--- a/messages-uploaded-to-mailbox-correctly.md
+++ b/messages-uploaded-to-mailbox-correctly.md
@@ -43,6 +43,7 @@ Scenarios:
 - the sender is online, they have a mailbox on a device that is also online.  
 - The recipient is offline and they don't have a mailbox app.  
 - The sender's message will be uploaded to their own mailbox, and at this point the sent message has one tick
+- Then the sender's device needs to be put offline, to make sure that any messages that recipient may receive come to them from the sender's mailbox and not from the sender's Briar app
 - When the intended recipient comes online, the mailbox will forward them the message.  
 - Recipient's briar app will generate the ack, and if the sender is online they will see two ticks on the message that they sent to recipient. 
 **scenario 1B**