Double Opt-In in A2P 10DLC

Double Opt-In (DOI) is a compliance practice in A2P 10DLC messaging where users must confirm their consent twice before receiving SMS communications from a business. It enhances compliance with carrier and regulatory requirements, reducing the risk of spam complaints and improving message deliverability.

How Double Opt-In Works

1. Initial Sign-Up (First Opt-In)

• A user expresses interest in receiving SMS messages by submitting their phone number via a web form, text message, mobile app, or another method.

• Example: A customer texts "JOIN" to a 10DLC number.

2. Confirmation Request (Second Opt-In)

• The business sends an SMS asking the user to confirm their subscription, typically by replying with a keyword like "YES."

• Example: You requested to receive messages from [Brand Name]. Reply YES to confirm. Msg & data rates may apply.

3. Final Confirmation

• Once the user replies with “YES,” they are officially subscribed and can receive further marketing or transactional messages.

Why Double Opt-In is Important in A2P 10DLC

• Reduced Spam Complaints: Prevents accidental or fraudulent sign-ups, reducing the risk of messages being marked as spam.

• Higher Deliverability: Carriers are more likely to allow traffic from numbers that follow proper opt-in procedures.

• Improved Customer Trust: Users who confirm twice are more engaged and less likely to opt out later.