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TCPA Express Written Consent

TCPA Express Written Consent

Profile Headshot of Amit Gairola
Amit Gairola

5
mins read

November 8, 2024

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Key Takeways

According to a report, 15,220,700 texts are sent every minute of every day worldwide. Text messaging is a powerful tool for businesses, but it comes with strict rules under the Telephone Consumer Protection Act (TCPA). 

A key requirement is express written consent, meaning companies must get clear permission before texting customers; apart from exceptional cases like that of user authentication via SMS verification. This protects consumers from unwanted messages and keeps businesses compliant.

What is Express Written Consent?

Express written consent is the foundation of legal SMS marketing under the TCPA. It’s more than just getting permission—it requires a clear and direct agreement from consumers that they want to receive marketing messages.
To meet these standards, businesses must ensure that consent is specific and not obvious, leaving no room for misunderstanding. 

You can refer to our detailed guide on best practices for SMS marketing for more understanding on technicalities and regulations regarding SMS.

Key Components of Valid Consent

To ensure that your express written consent meets TCPA standards, it should include the following components

  1. Identification of the Business

Clearly state the name of your company or organization.

  1. Purpose of Communication

Explain that the messages will be for marketing purposes.

  1. Message Frequency

Provide information on how often messages will be sent.

  1. Potential Charges

Inform the consumer that message and data rates may apply.

  1. Opt-Out Instructions

Include clear instructions on how to stop receiving messages.

  1. Terms and Conditions

Provide a link to your full terms and conditions.

  1. Privacy Policy

Include a link to your privacy policy.

Methods of Obtaining Consent

  1. Online Forms

Add an unchecked checkbox or toggle for consent, using clear language about what the user is agreeing to.

  1. Text Message Opt-In

Use a keyword system like "Text JOIN to 12345" and send a confirmation with terms, asking for a reply to confirm.

  1. Paper Forms

Provide a separate section for SMS consent with clear language and keep a copy for records.

  1. Verbal Consent with Written Confirmation

Get consent during a call, then send a follow-up text or email for the customer to confirm.

  1. Mobile App Opt-In

Ask for consent during app registration or through pop-up notifications for messages or notifications.

How to Implement Double Opt-In?

A double opt-in process adds an extra layer of confirmation, enhancing the validity of the consent. Here’s how to implement it

  1. Initial Opt-In

The consumer provides their phone number and agrees to receive messages.

  1. Confirmation Message

Send a message asking the user to confirm their subscription.

  1. Final Confirmation

The user must take an action (e.g., replying YES) to complete the subscription.

Common Pitfalls in Getting Express Written Consent

  1. Unclear Language

Avoid legal jargon and hidden consent terms. Use simple, clear language that explains the type and frequency of messages customers will receive and keep consent requests separate from other agreements. The distinction between promotional and transactional SMS is also unclear for some cases.

  1. Pre-Checked Boxes

Never use pre-checked boxes to imply consent. Instead, provide unchecked boxes that require customers to actively opt-in, ensuring they make a deliberate choice to receive messages.

  1. Lack of Record-Keeping

Maintain detailed records of consent, including timestamps, IP addresses and the exact language used in the consent request. This helps prove compliance if ever questioned.

Conclusion

Obtaining express written consent is essential for compliant and respectful SMS marketing. By using clear, straightforward methods like online forms, text opt-ins or app-based consent, businesses can build trust with their customers. 

The same is also required by regulations like A2P 10DLC in the USA or DLT SMS (DLT registration) in India.

Avoiding common pitfalls—such as unclear language, pre-checked boxes and poor record-keeping—ensures that consent is valid and meaningful. Following these best practices not only keeps businesses compliant with the TCPA but also strengthens customer relationships.

Frequently Asked Questions

How do I choose the right OTP service provider?

When selecting an OTP SMS service provider, focus on:

  • Delivery reliability and speed
  • Global coverage and local compliance
  • Multi-channel support and fallback
  • Ease of integration
  • Pricing transparency

The right provider should not just send OTPs but ensure they are delivered consistently across regions and networks.

Not all OTP SMS service providers are built the same.

Some optimize for cost, others for flexibility but very few balance delivery reliability, global coverage and ease of use. And that balance is what actually impacts whether your users receive OTPs on time.

If OTP is critical to your product, focus on:

  • reliable delivery (not just sending)
  • multi-channel fallback
  • scalability across regions

Try It for Yourself

Why is multi-channel OTP important?

Relying only on SMS can lead to failed verifications due to:

  • network issues
  • telecom filtering
  • device limitations

Multi-channel OTP systems (SMS + WhatsApp + voice) improve success rates by automatically retrying through alternative channels if one fails.

What is the best OTP SMS service provider in India?

Some of the commonly used OTP SMS service providers in India include MSG91, Exotel and 2Factor.

That said, India has additional challenges like DLT compliance and operator filtering. Platforms that handle these internally while also offering fallback options tend to provide more consistent OTP delivery.

Which is the cheapest OTP service provider?

Providers like Fast2SMS and 2Factor are often considered among the cheapest OTP service providers, especially in India.

However, lower pricing can come with trade-offs such as:

  • lower route quality
  • higher delivery delays
  • limited fallback options

For mission-critical OTP flows, reliability often matters more than just cost.

Which is the best OTP service provider in 2026?

The best OTP service provider depends on your use case.

  • For global scale and flexibility: Twilio, Infobip
  • For cost-effective APIs: Plivo
  • For India-focused SMS OTP: MSG91, Exotel

However, platforms like Message Central stand out by balancing global coverage, multi-channel fallback and ease of deployment, making them suitable for businesses that prioritize delivery reliability.

What is an OTP service provider?

An OTP service provider enables businesses to send temporary verification codes to users via channels like SMS, WhatsApp or voice to authenticate logins, transactions or sign-ups.

Modern OTP SMS service providers go beyond just sending messages, they ensure reliable delivery using optimized routing, retries and sometimes multi-channel fallback.

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