Why SMS Verification Requirements Are Changing (and What It Means for Businesses)

If your business relies on SMS to communicate with customers, you may have noticed new requirements around business verification. Messaging providers such as Twilio, Sinch, and Bandwidth now require additional business information, including your Employer Identification Number (EIN) and verified company details, before allowing SMS traffic to be sent at scale.

This shift is not limited to a single platform. It reflects broader changes across the messaging ecosystem, driven by mobile carriers like AT&T, T-Mobile, and Verizon, to improve trust, accountability, and message quality.

SMS has long been one of the most effective channels for reaching customers directly. As its importance has grown, so has the need to ensure that messages are coming from legitimate, identifiable businesses.

What’s Driving These Changes?

Over the past several years, mobile carriers have seen a significant rise in spam messages, fraudulent campaigns, and unverified senders exploiting messaging channels. These issues reduce consumer trust and make it harder for legitimate businesses to reliably reach their customers.

To address this, carriers have introduced stricter requirements that mandate businesses to register and verify their identity before sending application-to-person (A2P) messages. In the United States, this has taken shape through A2P 10DLC (10-Digit Long Code) registration, which connects messaging activity to a verified business and a defined use case.

You can learn more about these requirements here:

• The Campaign Registry (TCR) Overview
• Twilio's Guide to A2P 10DLC

The objective is simple: Every message should be tied to a real business, with clear accountability and user consent.

What Information Is Now Required?

While requirements vary slightly by provider, most verification processes now require businesses to submit the following:

• Legal business name
• EIN or equivalent tax identification number
• Business address and contact information
• Website URL
• Description of messaging use case
• Opt-in and consent process
• Sample messages

This information is used to validate your business and define how you engage with customers. It also allows carriers to evaluate whether your messaging practices align with compliance standards and user expectations.

What Happens Without Verification?

Businesses that do not complete verification are increasingly treated as untrusted senders. As a result, carriers may limit or block message delivery.

This can lead to:

• Message filtering: Messages never reach the recipient.
• Throttling: Delivery speeds are significantly delayed.
• Full blocking: SMS traffic is entirely stopped.

In many cases, these issues are not immediately visible. Messages may appear as successfully sent within your platform but fail to reach the customer. This creates a disconnect between marketing activity and actual customer engagement, making performance difficult to measure and optimize.

Why This Matters for Businesses

These requirements introduce additional steps, but they are quickly becoming essential to maintaining a reliable SMS strategy.

Verified messaging improves deliverability and ensures that your communications consistently reach your audience. It also reinforces trust by making it clear who the message is coming from and why the customer is receiving it.

From an operational perspective, verification reduces the risk of disruptions that can impact campaigns, customer journeys, and time-sensitive communications. Without it, even well-executed messaging strategies can underperform due to factors outside of your control.

A Shift Toward a More Trusted Messaging Ecosystem

This evolution in SMS mirrors changes seen across other channels. Email, for example, has long relied on authentication frameworks such as SPF, DKIM, and DMARC to verify sender identity and reduce abuse.

SMS is moving in the same direction. Identity, consent, and transparency are becoming foundational requirements for scale.

Industry organizations such as the CTIA have established best practices that emphasize clear opt-in processes, accurate sender identification, and responsible data usage. These standards are now being enforced more consistently at the carrier level.

You can review these guidelines here:

• CTIA Messaging Principles and Best Practices

Messaging providers act as intermediaries, but the enforcement happens at the carrier level. This means the requirements apply broadly regardless of which platform you use.

What Businesses Should Do Next

To stay ahead of these changes, businesses should take a proactive approach to verification and messaging strategy.

1. Ensure Information Accuracy: Your business information must be accurate and consistent across all systems. Your legal name, EIN, and contact details should align perfectly with official records.
2. Define Your Use Case: Be specific about what messages you send, who receives them, and how consent is obtained.
3. Implement Compliant Opt-Ins: Create opt-in processes that make it easy for customers to understand exactly what they are signing up for.
4. Verify Early: Complete verification early to avoid delays, filtering, or disruptions to your messaging programs.
5. Monitor Performance: Closely monitor delivery rates. Drops in engagement or delivery speed may indicate compliance gaps that need to be addressed.

Key Takeaways

SMS remains one of the most effective ways to engage customers, but the infrastructure supporting it is evolving. Verification is no longer optional for businesses that want to scale and maintain consistent performance.

These changes are designed to reduce abuse and improve the reliability of messaging across the ecosystem. While they introduce additional requirements, they also create a more secure and trustworthy channel for both businesses and consumers.

Organizations that align their data, identity, and messaging practices with these standards will be better positioned to deliver relevant, timely communications that drive results.