SMS marketing compliance guide (TCPA, 10DLC, opt-in)
SMS outreach needs prior express consent, 10DLC registration, quiet-hours, and a clear opt-out. Get it wrong and you face TCPA penalties + carrier blocks. Here's the compliant setup.
Short answer: compliant SMS marketing in the US needs prior express (written) consent, a registered 10DLC brand and campaign, quiet-hours (no texts before 8am or after 9pm local), and a clear opt-out (STOP) honoured on the spot. Skip any one and you're exposed to TCPA penalties ($500–$1,500 per text) plus carrier filtering.
The compliant setup
- Consent — capture opt-in with clear language; log it.
- 10DLC — register your brand + campaign before sending A2P.
- Identify yourself in the first message.
- Quiet hours — send only 8am–9pm in the recipient's timezone.
- STOP = done — suppress instantly, cross-channel.
Why it matters
Carriers block unregistered A2P traffic outright now — registration isn't optional. Consent and opt-out are the legal floor, not a nice-to-have.
Autocloz enforces it
Autocloz checks 10DLC and gates every SMS on consent, quiet-hours and DNC, and treats STOP as a suppression across every channel.
> Start free — add an SMS sender and stay compliant by default.