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MSG-SMS-STOPDeterministiclegally required

Campaign messaging honours opt-out keywords

What the source requires

Recipients must be able to revoke consent, and the statute carries a private right of action.

Why this is hard to satisfy

Campaigns are sent from tools that do not enforce keyword handling, and the exposure is per message.

What we do about it

Pre-send gate. A campaign that cannot demonstrate opt-out handling does not send.

In build · phase two

What this tier means

Same input, same verdict, every time — no model in the loop. This is the only tier where the word “verified” is literally true.