SMS Notifications — Opt-in & Consent
Subi now collects explicit SMS consent from subscription customers through three touchpoints. Every opt-in is recorded with a full audit trail (phone number, source, timestamp) so transactional SMS delivery is Twilio- and TCPA-compliant.
How customers opt in
1. Thank-you page (after checkout)
After completing a subscription order, customers see an SMS block with their phone pre-filled (or a country-code + number input if the phone is missing). Clicking Subscribe to SMS Updates creates the consent and triggers a welcome SMS.
2. Customer portal (subscription management)
An SMS section inside the Customer card. If a phone is on file, customers toggle it on. If not, they see an Add phone to subscribe button that opens the contact-info modal; once the phone is saved, the section transitions to a toggle without a page reload.
3. Shopify Customer Account extension
Same toggle UX embedded natively inside Shopify's Customer Account. Customers on stores using Shopify's new account surface get the opt-in flow without leaving Shopify.
How customers opt out
In-app toggle — toggle OFF from the portal or Customer Account extension.
Reply STOP — customers can reply STOP to any SMS. Consent is revoked immediately; the customer phone on file is preserved so email and order flows continue unaffected.
Merchant visibility
In the admin, the single subscription contract page shows a read-only SMS consent status line: Opted-in / Opted-out / Never opted-in, plus the source (thank-you page / portal / Customer Account / STOP) and timestamp. No merchant action is required — customers drive opt-in and opt-out themselves.
Requirements
Subi Plus plan with SMS enabled.
At least one contract-SMS notification template enabled under Settings → Notifications → SMS.
Shopify store with subscription contracts.
Common support questions
"I opted out but I still got an SMS — why?" — Opt-out is immediate on new messages, but a message already enqueued before the opt-out can still be delivered. If your customer receives one more than a minute after opting out, contact support.
"Can I change my phone number after opting in?" — Yes, edit your phone in the Contact Info section of the portal or in Shopify Customer Account. Your existing consent carries over — no need to opt in again.
"Does replying STOP also cancel my subscription?" — No. STOP only opts you out of SMS updates. Your subscription is unchanged; you'll still receive email and order notifications.