New Spanish SMS Law: Businesses Must Register Their Sender IDs by June 7, 2026

Starting June 7, 2026, a new regulation will come into effect in Spain requiring all businesses and public bodies that use alphanumeric sender IDs in SMS messages (names like “ClinicaLopez” or “Notifycal”) to register them in an official database managed by the CNMC.

This measure is part of Order TDF/149/2025, dated 12 February, issued by the Ministry for Digital Transformation and the Civil Service, aimed at fighting identity theft (smishing) and restoring trust in business messaging.

⚖️ What the law says

Order TDF/149/2025 introduces several measures to protect consumers against telephone and SMS scams.
Among them, the creation of a national database of alphanumeric sender IDs used by businesses and public administrations to identify themselves in text messages (SMS, MMS, or RCS).

From June 7, 2026, telecom operators will be required to block any message using an unregistered or fraudulent sender ID.

In summary, companies sending SMS must:

• Register their sender name (e.g., “BeautySalonAna” or “DentalClinicSmile”) with the CNMC.
• Prove ownership by linking it to their tax ID (NIF/CIF).
• Use only approved and verified identifiers in all commercial or transactional messages.

🏢 Who it affects

This law applies to all companies, freelancers, and public entities that send SMS or RCS messages to clients or users, including:

• Dental, aesthetic, and physiotherapy clinics that send appointment reminders.
• Hair salons, workshops, personal trainers, or wellness centres.
• Real estate agencies, accountancies, academies, or online stores sending delivery or booking notifications.

Even if you only send appointment confirmations, you’ll still need to register your sender name if it’s alphanumeric rather than a numeric sender.

📋 How the registration will work

The CNMC (National Commission on Markets and Competition) will manage the new sender ID database.
Although the system is still in development, the Ministry has confirmed that registration will be fully digital and free.

Expected steps:

1. Business identification (Tax ID / CIF).
2. Declaration of the alphanumeric sender name (e.g., “PharmacyGomez”).
3. Technical validation by your SMS provider (e.g., Vonage, Twilio, or Notifycal).

Once validated, the sender name will be officially linked to your company, ensuring no one else can use it.

📆 Key dates

• 12 February 2025: Publication of Order TDF/149/2025 in the Official State Gazette (BOE-A-2025-2870).
• Throughout 2025 and early 2026: Implementation of the system by CNMC and operators.
• 7 June 2026: Deadline for all companies to register their sender IDs.
  After this date, messages with unregistered aliases may be automatically blocked.

🚀 What you can do now

Don’t wait until the last minute — acting early will save you trouble and disruptions.
Notifycal recommends:

1. Check your SMS sender name — make sure it’s clear, unique, and recognisable.
2. Centralise all SMS sending through a compliant provider like Notifycal.
3. Review your privacy policy if you process personal data for SMS reminders.
4. Follow CNMC updates regarding the opening of the registration platform.

🏁 Conclusion

Order TDF/149/2025 represents a turning point in SMS communications in Spain.
Its goal is to eliminate identity fraud and build trust between businesses and consumers.

If your business uses SMS to reach clients, start preparing now with a compliant, trusted provider like Notifycal.
You’ll not only avoid message blocks — you’ll also strengthen your brand credibility.