When someone in your contacts signs up for Signal, you’ll see a message that that person has joined Signal. Now you know you can contact them via Signal. If you prefer not to see these notifications, you can turn them off.
How to disable Signal̵
7;s contact notification notifications
Signal uses telephone numbers as addresses where you can reach people. When a phone number in your contacts signs up for Signal, you’ll see a notification that they can be reached on Signal. The name associated with that person comes from the contact information stored on your phone.
To hide these warnings, open the Signal app on your iPhone or Android phone. Tap your profile picture or username initials in the top left corner of the Signal conversation list.
Tap “Notifications” on the Signal Settings menu screen.
Under Events, tap the slider to the right of “Contact Joined Signal” to turn off these contact notifications.
That’s it – Signal won’t let you know when your friends, family, colleagues or other contacts join in the future. The Signal app still knows, of course. When you tap the “New Message” icon, you will see all your contacts on Signal, ready to be contacted.
Can you stop the signal from telling people when to sign up?
There is no way to prevent Signal from notifying people when you sign up. If someone has your phone number in their contacts, Signal will let them know that their phone number is a member of Signal. This has nothing to do with whether you give Signal access to your own contacts.
The only way to avoid this is to use a secondary phone number. Signal is designed to work with phone numbers and to be a user-friendly SMS replacement, that’s why it works this way. If you want a chat service that doesn’t use phone numbers as identifying information, for example if you prefer usernames that don’t display your phone number, Signal isn’t the app for you.