How does the TDF/149/2025 legislation affect your company’s calls and SMS?

New legislation TDF/149/2025, published in the BOE on 15 February, introduces strict measures to combat identity fraud in telephone communications.

If your company uses calls or SMS to communicate with customers, it is essential that you understand the changes, as non-compliance could result in the blocking of your communications and severe penalties.

To ensure efficient and uninterrupted customer service, businesses will need to adapt their communications strategies. This means reviewing the numbering used in your contact centre for outbound calls.

THE ORIGIN OF THE REGULATION: A RESPONSE TO THE GROWING THREAT OF FRAUD

Spain is experiencing a significant increase in digital fraud, with a large proportion of these crimes occurring through fraudulent calls or SMS. According to recent data, 50% of digital fraud in the country originates from these types of communication.

“50% of digital fraud in the country originates from these types of communication.”.

El País

To tackle this problem, Decree TDF/149/2025 establishes new obligations for telecoms operators, requiring them to identify and block communications that do not comply with legal requirements.

WHO WILL BE AFFECTED BY THE REGULATION?

The Regulation directly affects three key players in the telecommunications and contact centre sectors:

• Telecom operators, who are responsible for detecting and blocking calls and SMS that do not comply with the regulation.
• Contact centres, which must ensure the use of authorised numbering and comply with the new restrictions.
• Telemarketing or customer service departments, which will have to adapt their strategies in order to avoid communication disruptions.

SERVICES AFFECTED BY REGULATION TDF/149/2025

The restrictions introduced by the Order will apply to calls and SMS according to the following timetable:

From 7 March 2025:

• Blocking of all calls and SMS from a number not associated with a user or service.

From 7 June 2025:

• Blocking of all calls and SMS sent from abroad that simulate being sent from Spain (using national numbering).
• Blocking of all unsolicited commercial or customer service calls from a mobile number.

From 7 June 2026:

• Blocking of all SMS not sent from a pseudonym registered with the CNMC (National Commission for Markets and Competition).

Failure to comply with any of these provisions may result in fines of up to €2 million.

KEY ACTIONS TO COMPLY AND AVOID PENALTIES

In order to ensure compliance with Decree TDF/149/2025 and to avoid communication disruptions, you must take the following steps

• Ensure that the numbering used for calls is allocated and authorised (800/900 and geographical numbers are available for this purpose).
• Ensure that your telecoms provider is compliant with the new legislation.
• Replace mobile numbering in outbound campaigns with 800 or 900 numbers.
• Use international numbering for outbound calls from abroad*.
• Register all aliases used to send SMS with the CNMC.

*Spanish companies with offshore or nearshore operations may request an exemption from the Secretary of State for Telecommunications and Digital Infrastructure to continue using their usual numbering.

NEED MORE INFORMATION ABOUT THE NEW REGULATION?

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