This is the most common question we get from new Message IQ customers. Growing a strong SMS list is one of the fastest ways to reach customers where they pay the most attention. The challenge is collecting consent in a way that carriers approve, customers understand, and your team can scale. CTIA, TCPA, and 10DLC rules all require clear and informed opt-ins, so every method you use needs to be transparent, easy to understand, and traceable.
Below are seven reliable and compliant ways to gain SMS consent. Each method follows carrier rules, supports 10DLC registration, and helps you build a list that drives real response rates.
1. Invite your existing email subscribers
Your email list is a high quality source of SMS opt-ins because subscribers already recognize your brand and trust your communication. A simple message can explain the value of joining your text list, how often you send messages, and what they will receive. Harbor Freight offers a good example with clear value statements and a simple call to action.
Be sure your email includes the required disclosures such as message frequency, data and message rates, a link to your Terms and Privacy Policy, and clear opt-out instructions.
2. Add a compliant checkbox to your website forms
Website forms already capture intent, which makes them ideal for SMS consent. Whether the form is for contact, scheduling, gated content, or newsletter signups, add a checkbox for SMS opt-in and keep it unchecked by default.
List all required disclosures next to the checkbox so the user understands what they are joining.
3. Use a keyword opt-in campaign
Keyword opt-ins let users text a simple word to your 10DLC number or short code. In addition to using this method in emails, it works well at events, inside emails, in printed materials, and on digital ads. Once they text the keyword, follow with a confirmation message that restates your program name, message frequency, and opt-out instructions.
Publish all required disclosures wherever the keyword appears.
4. Capture SMS consent at checkout
Online checkout flows are a natural place to request SMS opt-in because customers are already entering contact information. Ask for permission to send updates, confirmations, or promotional alerts. As always, the checkbox cannot be preselected and disclosures must be visible on the same screen.
This method often produces high quality opt-ins because the customer is actively engaged.
5. Use a secure in-store tablet or point of sale
If you operate a retail store, restaurant, or service business, an in-store tablet can help customers join your SMS list quickly. Keep the form light. Ask only for the essentials and present all disclosures directly on the screen.
This approach gives your team an easy, repeatable way to capture consent during the natural flow of a visit.
6. Add SMS opt-in prompts inside your customer portal or mobile app
If your customers log in to a portal or app, you can ask for SMS consent while offering notification preferences. These prompts can include reminders about appointments, account updates, or order notifications.
Transactional messages may not require the same level of consent, but promotional messages do. Collect consent for both on the same settings screen to simplify the user experience.
7. Use QR codes that link to mobile-friendly opt-in forms
QR codes are flexible and allow you to capture consent from printed signage, packaging inserts, trade shows, and direct mail. The scan directs users to a clean form with all required disclosures.
This gives you a compliant path to grow your SMS list anywhere your brand shows up in the real world.
Want more ideas? Schedule an SMS strategy session.
