Expected SMS frequency disclosed at opt-in

CTIA SMS Guidelines and carrier requirements mandate that SMS opt-in forms disclose message frequency — either as a specific count ('up to 4 messages per month') or a general disclosure ('message frequency varies'). Carriers validate opt-in flows during 10DLC campaign registration and will reject or throttle campaigns whose opt-in language is non-compliant. The confirmation SMS sent immediately after opt-in is the carrier's primary verification that the subscriber intended to opt in — omitting frequency and STOP instructions from that message is a registration failure point that can cause a 10DLC campaign to be denied.

Add frequency disclosure to the opt-in form label and include frequency and opt-out instructions in the confirmation SMS sent immediately after opt-in.

// SMS opt-in form — frequency disclosure required
<label>
  <input type="checkbox" name="smsConsent" />
  I consent to receive marketing texts from YourProduct.{' '}
  <strong>Message frequency varies.</strong>{' '}
  Message & data rates may apply. Reply STOP to opt out. Reply HELP for help.
</label>

// Confirmation SMS — sent synchronously after opt-in is recorded
await smsClient.messages.create({
  from: process.env.TWILIO_FROM_NUMBER,
  to: phoneNumber,
  body: 'YourProduct: You are now subscribed to marketing alerts. Msg freq varies. Msg & data rates may apply. Reply STOP to cancel, HELP for info.',
})

Carriers check both the opt-in form language and the confirmation SMS content during 10DLC campaign review — both must include frequency and opt-out instructions.