Compliance · ASG Help

STOP, START, and opt-out handling

Understand supported opt-out keywords and how to test them before client production.

Agency SMS Gateway Help CenterUpdated September 2026
Before making production changes: exact screen names and platform behavior can change as GoHighLevel, Android, carriers, and the underlying messaging platform evolve. Test changes on a controlled deployment first.

Supported behavior

The underlying platform currently documents recognition of common opt-out keywords such as STOP, END, CANCEL, QUIT, and UNSUBSCRIBE, with START used for supported resubscription.

Test before launch

  1. Send a normal message to a test phone.
  2. Reply STOP.
  3. Confirm the contact is marked/treated as opted out and further automated sending is blocked.
  4. Reply START and confirm the supported resubscribe behavior.

Legal reminder

Software opt-out handling does not replace your responsibility to obtain appropriate consent and follow applicable law and carrier rules.

Still not working? Contact ASG with the device name, carrier, GHL location, approximate timestamp, and the exact step that failed.