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Running a business SMS program in the United States requires your phone number to be registered under the A2P 10DLC framework, and every customer you message must have given explicit consent. Fit4Life OS is built to support both requirements, your Twilio number is registered to an approved Brand and Campaign, and the opt-in portal handles compliant consent collection for you. Understanding how this works protects your clinic from carrier filtering and regulatory risk.

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A2P 10DLC Registration

All US business text messaging must use an Application-to-Person (A2P) 10DLC registered number. This means your Twilio long-code number is tied to a verified Brand (your business identity) and a Campaign (the specific messaging use case, in your case, customer reorders and account updates for a healthcare practice). Fit4Life OS configures this for you through Twilio. Before your bot goes live, confirm the following are approved in your Twilio console:
  • Brand registration: your clinic’s legal business name, EIN, and contact details are submitted and approved
  • Campaign registration: the campaign is registered under the appropriate use case category and linked to your Messaging Service
  • Number assignment: your clinic’s long-code number is attached to the registered Messaging Service
Campaign approval from The Campaign Registry (TCR) can take several business days. Do not begin sending outbound messages until you receive confirmation that your campaign status is VERIFIED.
The primary opt-in path for your clinic is the public consent portal at fit4lifecare.com/opt-in. Direct new customers to this page before you initiate any outbound messaging. On the opt-in form, customers enter their name and mobile number and check a consent checkbox (unchecked by default). The canonical disclosure (the single source of truth lives in src/lib/consent.ts and is byte-matched to the approved A2P Brand name Fit4Life Medical Centers):
I agree to receive recurring text messages from Fit4Life Medical Centers at the phone number provided, order and reorder confirmations, appointment and account updates, and customer-care replies. Consent is not a condition of purchase. Message frequency varies. Msg & data rates may apply. Reply STOP to unsubscribe, HELP for help. See our Privacy Policy and Terms.
Once submitted, the form records a consent row (name, phone, the exact consent text agreed, timestamp, source, and IP) in the sms_consents audit log. This is a compliance record, it is not wired into the bot and does not, by itself, enable any messaging. The bot is reply-only: it responds to inbound texts (a customer’s inbound message is itself consent for that reply conversation). There is no proactive, bot-initiated outbound today.
Never initiate proactive outbound messages to customers who have not explicitly opted in through the portal or by texting your clinic number first. Sending to non-opted-in numbers violates carrier policies and TCPA regulations and can result in your campaign being suspended.

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Customer-Initiated Contact

A customer who texts your clinic number first is considered to have initiated contact. In this case, you may reply to their message without requiring them to complete the opt-in form first, their inbound text constitutes consent for that reply conversation. If you later want to send proactive outbound messages to that customer (outside of a reply context), collect a formal opt-in through the portal.

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STOP / HELP / START Keywords

The bot handles the following keywords deterministically, regardless of the customer’s message context:
STOP, START, and HELP are processed before any other bot logic. Even if a customer texts STOP mid-order or mid-conversation, the opt-out takes effect immediately and no further messages are sent.

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Opted-Out Numbers

Once a number is opted out, the bot enforces a hard block, it will not send any message to that number, even if the customer has a pending order, an unpaid invoice, or an active conversation thread. If a customer who has opted out contacts you about their order, handle the interaction through a call or email. Do not manually send SMS to opted-out numbers through the Fit4Life inbox.

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Privacy Policy and Terms of Service

Your clinic’s SMS program is covered under the legal documents hosted at: These pages describe how customer data is collected, stored, and used. Direct customers to these URLs if they ask about their data rights or how their phone number is used.

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What to Do If a Customer Says They Didn’t Opt In

If a customer contacts you claiming they never consented to receive texts from your clinic, take the following steps:
1

Opt them out immediately

Reply STOP on their behalf, or have them text STOP, to stop all future bot messages to their number right away.
2

Review the opt-in record

Check the consent log for that phone number. The portal records a timestamp, IP address, and form submission for every opt-in. If you have a record, share it with the customer if they request it.
3

Check for customer-initiated contact

Review the SMS thread. If the customer texted your number first, that constitutes initiation and you may have complied. Document this finding.
4

Escalate if needed

If you cannot locate an opt-in record and the customer did not initiate contact, treat the situation as a compliance incident. Document it, keep the number opted out, and consult your legal counsel if the customer escalates further.