SMS compliance in 2026 involves much more than adding “Reply STOP to unsubscribe” to the end of a text. Businesses must consider federal law, carrier requirements, industry guidelines, platform policies, and state-level rules before sending marketing messages.
Moreover, Application-to-Person 10DLC registration has made business identity, campaign purpose, consent language, and sample messages more visible to mobile carriers. As a result, brands can no longer treat compliance as a form they complete after launching a campaign.
Instead, businesses should design compliant consent and messaging processes from the beginning. Although the exact requirements depend on the message type and jurisdiction, several core principles apply to most U.S. business texting programs.
What Is A2P 10DLC?
A2P 10DLC stands for Application-to-Person messaging through a standard U.S. 10-digit long-code number. It applies when software sends SMS or MMS messages from a local number to recipients in the United States.
The Campaign Registry collects information about participating brands and campaigns. However, most businesses do not register directly with the registry. Instead, they register through an approved messaging provider, which acts as the Campaign Service Provider.
A typical registration process includes:
- The business’s legal name
- Employer Identification Number or other tax information
- Business address and contact details
- Campaign type and messaging purpose
- Description of the opt-in process
- Sample messages
- Opt-out and help responses
- Website and policy information
Accurate information matters because The Campaign Registry verifies the connection between the legal company name and its tax identification details. In addition, incomplete campaign descriptions or inconsistent sample messages can delay the review process.
Why 10DLC Registration Matters
Registration does not replace consumer consent. Likewise, approval does not prove that every future message complies with the Telephone Consumer Protection Act.
However, 10DLC gives carriers greater visibility into who sends a message and why. Therefore, properly registered campaigns generally gain access to approved business-messaging routes, while unregistered or mismatched traffic may face filtering, lower throughput, or additional fees.
A business should also keep its registration current. For example, a company registered for appointment reminders should not suddenly use the same campaign to send unrelated daily promotions.
Instead, the registered use case, sample messages, consent process, and live traffic should tell the same story.
What Counts as a Valid SMS Opt-In?
A valid opt-in should clearly communicate what the person agrees to receive. Furthermore, the business should collect consent before sending messages that require it.
For recurring marketing texts, a strong disclosure normally identifies:
- The brand or program
- The type of messages
- Expected or recurring message frequency
- The fact that message and data rates may apply
- Instructions for getting help
- Instructions for opting out
- Links to the privacy policy and terms
- A statement that consent is not a condition of purchase, when applicable
CTIA guidance emphasizes obtaining consent before sending non-consumer messaging and providing a clear way for recipients to stop future messages. Additionally, its short-code monitoring guidance expects opt-in communications to identify the program, explain message frequency, and provide help and opt-out information.
Therefore, a checkbox that only says “Send me updates” may not provide enough detail for a recurring promotional program.
Single Opt-In vs. Double Opt-In
A single opt-in occurs when someone submits a phone number through a form, keyword, checkout page, or other consent process. The person may then receive the promised messages without taking another confirmation step.
A double opt-in adds a confirmation message. For example, the brand may ask the subscriber to reply YES before joining the program.
Double opt-in does not automatically apply to every campaign. Nevertheless, it can improve list quality, reduce incorrect phone-number submissions, and create stronger evidence that the subscriber intended to join.
Therefore, brands should consider double opt-in for higher-risk acquisition sources, shared devices, lead-generation forms, or situations where someone could easily enter another person’s number.
Opt-Out Requests Must Be Easy to Process
Subscribers must have a practical way to revoke consent. Common keywords include:
- STOP
- END
- CANCEL
- UNSUBSCRIBE
- QUIT
However, businesses should not rely only on exact keyword matching. A customer may write “Please stop texting me” or “Remove me from this list.” Consequently, businesses need systems and support processes that recognize reasonable opt-out language.
Several FCC consent-revocation provisions took effect on April 11, 2025. These rules strengthened consumers’ ability to withdraw consent through reasonable methods and required businesses to process covered requests within the permitted period.
However, one specific rule concerning how a revocation applies across unrelated robocalls and robotexts received a waiver. In January 2026, the FCC extended that waiver until January 31, 2027. Therefore, businesses should not confuse that delayed provision with permission to ignore ordinary unsubscribe requests.
What Is Changing in 2026?
Messaging providers increasingly expect businesses to provide public privacy policies and terms that address SMS programs.
For example, Twilio announced that new A2P 10DLC campaign registrations submitted through its API require privacy-policy and terms-and-conditions URLs starting June 30, 2026. This represents a platform-specific registration requirement, but it also reflects the broader demand for transparent data practices.
A privacy policy should explain how the company collects, uses, protects, and shares phone-number data. Moreover, businesses should avoid language suggesting that SMS consent data may be sold or shared with unrelated third parties for their own marketing.
Campaign Reviews Require Better Documentation
Registration has become a substantive review rather than a simple administrative step. Providers may examine the opt-in page, policy links, sample messages, business identity, and campaign description.
Additionally, review queues can create delays. Twilio currently warns that some campaign reviews may take approximately 10 to 15 days. Consequently, businesses should register before a planned promotion or product launch.
The FCC’s One-to-One Rule Did Not Take Effect
Marketers may still encounter outdated articles claiming that a new FCC rule requires separate consent for each seller under all lead-generation arrangements.
However, the Eleventh Circuit vacated that rule in January 2025 after finding that the FCC exceeded its statutory authority. The FCC later removed the invalidated language from its rules.
Nevertheless, businesses should not interpret that decision as permission to use vague or misleading consent. The consent language should still identify the expected callers or texters clearly enough to support the permission claimed.
A Practical SMS Compliance Checklist
Before launching a campaign, confirm that:
- The correct legal business has completed 10DLC registration.
- The registered campaign matches the actual messages.
- The opt-in form clearly describes the program.
- Consent records include timestamps and acquisition sources.
- The privacy policy and terms cover SMS messaging.
- Every message identifies the sender when needed.
- STOP, HELP, and natural-language requests work correctly.
- Suppression lists update across connected systems.
- Teams do not upload purchased or questionable contact lists.
- Campaign performance includes complaint and opt-out monitoring.
Build Compliance Into the Customer Experience
SMS compliance in 2026 should not function as a legal disclaimer attached to an aggressive marketing strategy. Instead, it should shape how the brand collects consent, stores records, registers campaigns, sends messages, and processes customer choices.
10DLC registration improves transparency, but it does not create permission. Likewise, a valid opt-in does not justify unlimited messaging.
Ultimately, compliant brands make clear promises and keep them. They tell subscribers what to expect, send messages that match those expectations, and make leaving as easy as joining. Because rules and carrier policies continue to evolve, businesses should also review their programs regularly with qualified legal counsel.