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SMS

Text-message delivery. Highly regulated (TCPA in the US) and cost-per-message non-trivial; reserved for high-value activations.

confidence 85%v1reviewed Apr 26, 2026modality, sms, tcpa, regulated

SMS

Text-message delivery. Highly regulated and per-message cost is significant — typically reserved for high-intent or transactional moments.

Governance. TCPA (US) requires explicit prior express consent; opt-out keywords (STOP, UNSUBSCRIBE) must be honored within seconds. Architecture must surface consent state at activation time.

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← Referenced by

  • applies-to-modalityconcept.modality-complexity— Each modality contributes to complexity
  • prerequisite-ofconcept.consent-management— TCPA requires express consent before any SMS send; consent management is a hard prerequisite of the SMS channel.
  • governsconstraint.tcpa-revoke-all-universal-opt-out— TC-78. The Revoke-All rule governs SMS opt-out propagation: STOP to one sender's SMS must suppress that profile across all of that sender's downstream channels.
  • applies-to-modalityuse-case.abandoned-cart— OC-053. SMS is the secondary activation channel for abandoned-cart recovery: higher open rates than email for time-sensitive triggers, commonly layered after the initial email in multi-step re-engagement sequences. Requires explicit SMS consent (TCPA PEWC) — constraint.tcpa-prior-express-written-consent-sms applies.
  • applies-to-modalityuse-case.loyalty-program-personalization— OC-055. SMS is the secondary channel for time-sensitive loyalty triggers: same-day expiry offers, tier-qualifying spend confirmations, and redemption alerts. Node body explicitly names SMS in the multi-channel delivery list. Requires explicit PEWC consent — constraint.tcpa-prior-express-written-consent-sms applies.
  • applies-to-modalityuse-case.win-back— OC-057. SMS is a secondary win-back channel: time-sensitive incentive offers layered after initial email touchpoints in re-engagement sequences. The win-back use-case node body notes TCPA PEWC consent constraints on SMS — the same constraint pattern as use-case.abandoned-cart (OC-053). SMS win-back sequences require active consent management to avoid targeting lapsed customers who have also revoked SMS consent.