WhatsApp has introduced a username key feature designed to enhance user privacy by preventing unsolicited messages from strangers. When activated, anyone attempting to contact you for the first time using your WhatsApp username must enter the key before a chat can begin. However, the feature does not affect people who already know your phone number, have previously chatted with you, or are in the same group as you. People who scan your QR code or receive a message from you first can also contact you without needing the key.
How to Add a Username Key
WhatsApp users can create and manage their username key only from their primary mobile device. The feature is currently unavailable on WhatsApp Web and desktop apps. To activate it, open WhatsApp Settings, tap Account, select Username, and turn on the Username Key option. WhatsApp automatically generates the key, meaning users cannot create a custom code. If you prefer a different key, tap “Get a different key”, and WhatsApp will generate a new one.
How to Share Your Key
Once your username key is activated, you should share it alongside your WhatsApp username whenever you want a new person to contact you. Without the key, first-time contacts will not be able to start a conversation with you through your username. WhatsApp also will not notify you if someone fails to contact you because they do not have the key.
How to Change or Remove It
Users can update or delete their username key at any time by returning to Settings > Account > Username. Changing or removing the key does not affect existing chats. People you have already communicated with can continue messaging you without needing the new key. WhatsApp also noted that if an account is linked to a Meta account identifying the user as under 18, the username key is turned on by default, though it can still be changed or disabled at any time.
