On 1 June 2026, Spanish media reported that, in response to collective requests from telecom‑industry association DigitalES, CNMC issued amendments via Orden TDF/558/2026. The mandatory national‑network blocking date for SMS carrying unregistered alphanumeric Sender‑IDs was moved from 7 June 2026 to 15 September 2026, providing a compliance‑modification grace period for the whole sector.
The extension was triggered by heavy‑volume registration pressure at the launch of the alias‑registration scheme. Around 70 000 alias applications arrived during the bulk‑upload window. Large volumes of existing aliases required format adjustments and supplementary ownership documentation. Operators and A2P service providers faced substantial system‑rework and documentation workloads. Enforcement under the original timetable would have carried high risk of false‑positive blocking of legitimate business SMS.
During the transition period, pre‑existing legitimate A2P traffic lacking completed registration may transit provisionally, though regulatory compliance standards remain unchanged. The revision also adds supplementary rules covering RCS‑message registration, brand‑LOA authorization‑document verification standards and appeal procedures for anomalous aliases. After the 15 September deadline, major Spanish operators will enforce blanket blocking for all alphanumeric‑sender messages not logged in the CNMC alias repository. This date represents a critical implementation milestone for cross‑border A2P providers targeting Spain.
This postponement forms part of Spain’s broader anti‑smishing strategy. The underlying policy objective remains countering smishing fraud impersonating banks and public‑administration bodies; the adjustment merely prevents disruption to legitimate enterprise communications arising from compliance roll‑out.
