The Sol and Barrio de Las Letras Neighborhood Association, together with the Regional Federation of Neighborhood Associations of Madrid (FRAVM), has published a study concluding that only one in four VUTs in the capital complies with registration regulations. This situation, according to the groups, demonstrates that the Digital Single Window, promoted by the Ministry of Housing and Urban Agenda, is not achieving its goal of curbing the proliferation of these accommodations in areas such as the Centro district.

The analysis also reveals that at least 30 percent of VUTs in the neighborhoods of Sol, Cortes, and Embajadores that do have a registration code are, in fact, illegal according to the Madrid City Council's own records. This inconsistency suggests that the current system is not adequately verifying the legality of the enabling titles required to operate.

The report, based on statistical data from Inside Airbnb from September 2025, records from the Community of Madrid, and the municipal geoportal, highlights that out of the 25,094 accommodations in the municipality of Madrid, most are advertised without the code required by Royal Decree 1312/2024. Furthermore, it was found that 91 percent of accommodations registered as temporary or non-tourist rentals actually operate as tourist flats, which is described as a "clear fraud."

Given this situation, the FRAVM and the Sol and Barrio de Las Letras Neighborhood Association propose several measures. These include requesting digital platforms to immediately remove unregistered listings, auditing the operation of the Single Window, and prosecuting the fraudulent use of non-tourist codes. They also demand the creation of a public and accessible database, statistical exploitation of the Registry, and the approval of a regulation with a clear sanctioning regime for the Digital Single Window for Rentals. Finally, they urge Congress to promote Bill 122/000136 to regulate temporary and room rental contracts, seeking to combat fraud from disguised tourist rentals.