Why Your A2P 10 DLC Application May Get Rejected

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Last Updated: July 5, 2024

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A2P 10-digit Long Code (A2P 10 DLC) messaging has revolutionized business communication, where through a Local 10-digit number, a business can send messages to the customer. But to send A2P messages, a business needs to be approved and this does not happen for all A2P 10DLC applications.

In this blog, we’ll understand some of the most common reasons behind the A2P 10 DLC rejection and will let you know how to avoid it.

Common Reasons For A2P 10 DLC Application Rejection

A2P 10 DLC Application Rejection

1. Non-Compliance with Carrier Guidelines

There are measures put in place to avoid spam as well as issues of privacy of the users by carriers. Late reporting and failure to abide by the carrier guidelines are some of the reasons that A2P 10DLC gets rejected.

2. Incomplete or Inaccurate Information

It may be a nail of the application that has complete or accurate information that will be accepted. This encompasses missing information concerning the business, the message content, or the use of the application. Applications with incomplete information get rejected.

3. High Spam Complaint Rates

Carriers also monitor the complaint rate, along with the declaration of spam, very carefully when companies that have received numerous spam complaints in the past attempt to send emails, delays, and rejections are also frequent.

4. Prohibited Content

Sending messages with prohibited content, such as adult content, illegal activities, or misleading information, is a surefire way to get rejected.

5. Improper Message Formatting

Texts must also not exceed a certain character limit and it is mandatory to ensure the right message format. This means that such things as broken links and special characters, as well as excessive use of similar words, are likely to lead to rejection.

6. Missing Opt-Out Option Registration

Businesses must not make it difficult for recipients to opt out of their lists. If this is left out, your A2P 10 DLC application will probably be rejected.

7. Volume Misalignment

Businesses must accurately represent their expected message volume. This is especially going to be a rejection case when there is a large disparity between the projected and the actual volume.

8. Poor transparency in the Use Case

It also means that carriers need to be informed about the use case for A2P 10DLC. This is because the descriptions are either vague or misleading and this leads to rejection.

9. Failure to Register Use Case

The A2P message carriers have introduced registration procedures for use cases before businesses can use them. It also means that if all these requirements are not met the item, concern, or issue under consideration is likely to be rejected.

10. Exceeding Allowed Message Limit

In this case, each A2P 10DLC registration is assigned to a certain number of messages allowed within 10 consecutive days. Going over this can lead to rejection.

11. Poor Message Quality

Carriers evaluate the quality of messages sent over their networks. Messages with frequent typos, unclear content, or misleading information can lead to rejection.

12. Non-Responsive Support

Carriers may reject applications from businesses that do not provide responsive support to their customers or the carriers themselves.

Twilio SMS

One popular implementation of A2P messaging is the integration of Twilio SMS for SuiteCRM. This powerful combination enhances customer communication by enabling automated text messaging directly from the CRM platform. Businesses can send notifications, reminders, and updates, improving engagement and streamlining workflows.

13. Improper explanation of the procedure to obtain consent from recipients

Businesses that choose to gather consent from message receivers via their website may find that their A2P registration is denied due to an inadequate explanation of the complete opt-in procedure. Detailed explanations may comprise, but are not restricted to the following:

  • Description of a program or product

  • Contact details for customer service

  • instructions for opting out

  • Product Quantity or program disclosure for recurrent messages

  • Disclosure: “Message and data rates may apply.”

  • Ensuring customers agree to the website’s terms of service and privacy policy

Summary Table Of Rejection Cases And Solutions

Best Practices for Avoiding A2P 10DLC Rejection

1. Clear and Transparent Communication

Always be clear and transparent about the nature of your messages and their intended recipients. This includes providing detailed descriptions of your use case when registering with carriers for A2P 10 DLC registration

2. Comprehensive User Consent Management

Implement robust consent management practices, ensuring that all users have explicitly opted in to receive messages and can easily opt-out if they choose to.

3. Regular Monitoring and Compliance Checks

Continuously monitor your messaging practices and stay updated with carrier guidelines and regulatory requirements. Conduct regular audits to ensure compliance.

4. Quality Control for Messages

Ensure that all messages are well-crafted, free of errors, and provide clear value to recipients. High-quality messages reduce the risk of complaints and improve overall engagement.

5. Responsive Customer Support

Maintain a responsive customer support team to address any issues or inquiries from both customers and carriers promptly. Good communication can prevent potential problems from escalating.

Additional Tips for a Successful A2P 10DLC Application

For further reading and resources on A2P 10 DLC and best practices in messaging, consider the following:

  • Carrier Guidelines: Regularly review the latest carrier guidelines and updates.

  • Industry Forums and Webinars: Participate in industry forums and webinars to stay informed about trends and regulatory changes.

  • Compliance Tools: Utilize compliance tools and services that help manage consent, monitor message quality, and ensure adherence to guidelines.

  • Obtain Explicit Consent: Always get explicit consent from users before sending messages. This can be done through opt-in forms or confirmation messages.

  • Monitor Spam Complaints: Regularly monitor and address spam complaints to maintain a good reputation with carriers.

  • Stay Updated: Keep up with carrier guidelines and regulations as they may change over time.

By following these best practices, businesses can minimize the risk of A2P 10DLC rejection and maximize the effectiveness of their messaging campaigns.

A2P 10DLC Note:


A2P 10DLC offers a powerful tool for businesses to engage with customers directly. However, navigating the approval process requires a clear understanding of carrier guidelines and a commitment to best practices.

By addressing the common reasons for rejection and implementing the strategies outlined in this blog, businesses can maximize their chances of approval and effectively leverage A2P 10DLC for their communication needs.

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