Barcelona – As SMS-based fraud continues to rise globally, Spain is taking a proactive step to protect consumers. The National Commission on Markets and Competition (CNMC) has approved regulations establishing a registry of aliases – essentially, sender IDs – for SMS, MMS, and RCS messages sent to Spanish mobile numbers. The aim is to verify the legitimacy of senders and restore trust in electronic communications, a growing concern as scammers increasingly impersonate legitimate businesses and organizations.
The fresh system, detailed in circular CIR/DTSA/010/25, will require companies and public administrations to register the names or brands they use as senders. This means that if a business wants to send messages displaying its brand name to customers, it must first register that alias with the CNMC. Messages originating from unregistered aliases will be blocked by mobile operators starting June 7, 2026, according to the CNMC.
This initiative comes as part of a broader effort to combat fraud through calls and messages, outlined in Order TDF/149/2025, of February 12, 2025. The CNMC’s move is designed to directly address the increasingly common practice of “spoofing,” where fraudsters use familiar names – like banks or well-known companies – to trick recipients into divulging personal information or clicking on malicious links.
How the Registry Will Work
The CNMC-managed registry will collect alphanumeric identifiers – combinations of letters, numbers, and other characters – used as senders in messages to Spanish numbers. Companies and public administrations can register their identifiers by demonstrating a legitimate connection to the brand, trade name, corporate name, or domain. Essentially, they need to prove they are who they say they are.
The circular similarly clarifies the responsibilities of various parties involved in sending messages – including messaging service providers at origin, transit, and termination. These providers will be obligated to block messages using unregistered aliases, those originating from unregistered providers, those sent without the legitimate owner’s authorization, or those from foreign companies not registered in Spain. This multi-layered approach aims to create a robust defense against fraudulent messaging.
For consumers, the impact will be a greater level of assurance when receiving SMS messages. Instead of relying on potentially misleading sender names, individuals will have increased confidence that the message is genuinely from the entity it claims to be. Although it won’t eliminate all scams, it raises the bar for fraudsters and makes it more difficult for them to operate effectively.
The CNMC’s action reflects a growing global trend toward stricter regulation of messaging services. As SMS fraud becomes more sophisticated, authorities are recognizing the need for proactive measures to protect citizens and businesses. Spain’s registry is a significant step in that direction, and it could serve as a model for other countries grappling with the same challenges.
The implementation of this registry isn’t simply a technical fix. it’s a fundamental shift in how sender identification is handled. Previously, it was relatively effortless for scammers to disguise their messages. Now, they’ll face a significant hurdle in the form of a centralized, verified registry. This will likely force them to adapt their tactics, but the CNMC hopes the increased difficulty will deter many from attempting fraud in the first place.
The success of the registry will depend on widespread adoption by legitimate businesses and effective enforcement by mobile operators. The CNMC will be responsible for maintaining the registry and ensuring its accuracy, while operators will be tasked with blocking unauthorized messages. Collaboration between these entities will be crucial to maximizing the impact of the new regulations.
It’s important to note that this regulation specifically targets the sender ID – the name displayed on the message. It doesn’t address the content of the message itself. Consumers should still remain vigilant and exercise caution when responding to SMS messages, even those from registered senders. Always verify requests for personal information through official channels and avoid clicking on suspicious links.
The June 7, 2026, deadline for blocking messages from unregistered aliases is fast approaching. Businesses operating in Spain should begin the registration process as soon as possible to ensure uninterrupted communication with their customers. The CNMC has provided guidance on the registration process, and mobile operators are preparing their systems to enforce the new rules.
This initiative underscores the evolving landscape of digital security. As technology advances, so too do the tactics of fraudsters. Regulations like the CNMC’s sender ID registry are essential for staying ahead of the curve and protecting consumers from the ever-present threat of online scams. The hope is that this measure will not only reduce fraud but also restore a sense of trust in a communication channel that has turn into increasingly vulnerable.
Looking ahead, the CNMC will likely monitor the effectiveness of the registry and make adjustments as needed. The fight against SMS fraud is an ongoing battle, and continuous adaptation is essential. The agency will also need to collaborate with international partners to address cross-border fraud schemes.
For Spanish consumers, the coming months will bring a noticeable change in the SMS messaging experience. While the transition may require some adjustment, the ultimate goal is a safer and more reliable communication environment. Stay informed about the new regulations and remain vigilant against potential scams.
