How digital monitoring is reshaping short-term rental enforcement in Europe

Spain’s decision to fine Airbnb €64 million for advertising unlicensed short-term rental listings has highlighted the growing role of technology in regulatory enforcement across Europe.

ShortTermRentalz interviewed Francesc Serrano, CEO and founder of Talk&Code, to understand how digital monitoring tools are being used by public authorities to identify potentially non-compliant listings at scale.

Can you explain how digital monitoring tools are used by public authorities in Spain to identify potentially unlicensed short-term rental listings?

In Spain, digital monitoring has become a key enforcement mechanism for public authorities dealing with the scale and fragmentation of the short-term rental market. These systems automatically analyse listings published across major online platforms, cross-checking the information against official tourism registries and regional licensing databases.

The monitoring focuses on identifying objective indicators of non-compliance, such as missing or invalid registration numbers, inconsistencies between advertised characteristics and registered data, duplicated listings, or properties operating in restricted zones. This allows authorities to move from reactive, complaint-based enforcement to a proactive, market-wide view of compliance, updated in near real time.

Following Spain’s €64 million fine against Airbnb for unlicensed listings, what role does digital monitoring play in helping authorities gather evidence at scale before enforcement decisions are made?

Large-scale enforcement actions are only possible when authorities can rely on structured, verifiable evidence collected consistently over time. Digital monitoring enables this by documenting how listings appear, change, and persist across platforms, creating a traceable record of potential non-compliance.

Instead of relying on isolated inspections or manual checks, authorities can identify systemic patterns, quantify the scale of irregular activity, and demonstrate whether platforms and hosts are complying with existing obligations. This type of evidence is particularly relevant before major enforcement decisions, as it supports proportionality, legal certainty, and due process.

In practice, digital monitoring allows administrations to build a factual basis first, and only then decide whether corrective measures, sanctions, or negotiations with platforms are warranted.

Are these monitoring systems mainly being adopted at a city or regional level, or are you seeing a move towards more centralised oversight across Europe?

In practice, the implementation of short-term rental monitoring systems remains primarily focused at the local and regional level. Regions such as Catalonia and Mallorca were among the first to adopt these systems precisely because they needed operational, data-driven tools to manage complex local realities.

Several countries are now exploring how to scale similar models nationwide after validating their results in key destinations. The recent case of Florence or Rome are a clear example of this trend: two major European cities choosing to adopt a monitoring model originally developed and tested in Spain to gain real-time visibility over its short-term rental market.

At the same time, many European countries are actively working on new regulatory frameworks for short-term rentals. To design effective and proportionate legislation, authorities need reliable, market-wide data on how rentals operate in practice. Digital monitoring provides that empirical foundation, offering policymakers concrete insights into supply, compliance levels, and territorial impact. In this sense, short-term rental monitoring is not only an enforcement tool, but also a critical source of data for shaping future regulation at both regional and national levels.

How do authorities typically verify findings from automated monitoring before taking action, and what safeguards exist to avoid incorrect enforcement?

Automated monitoring systems are designed to flag potential issues, not to impose sanctions autonomously. Once an irregularity is detected, it enters a validation process where inspectors review the data, contrast it with official records, and, when necessary, request clarifications from hosts or platforms.

Safeguards include multi-source verification, historical tracking of listings, and the use of certified digital evidence to ensure that what is being acted upon accurately reflects what was published online at a specific point in time. This layered approach significantly reduces the risk of false positives.

In most jurisdictions, enforcement decisions remain firmly in the hands of public officials, with clear procedural steps and appeal mechanisms in place, ensuring that digital monitoring strengthens legal certainty rather than undermining it.

How has increased digital monitoring changed the role and responsibilities of OTAs in European markets?

Digital monitoring has introduced greater accountability and transparency into the relationship between platforms and regulators. OTAs are increasingly expected to collaborate by standardising listing information, displaying registration numbers correctly, and responding more efficiently to removal or correction requests issued by authorities.

Rather than positioning platforms as enforcement agents, monitoring systems clarify responsibilities by creating a shared factual baseline. This has helped shift the dialogue from ad hoc takedowns to structured compliance processes, where platforms, authorities, and hosts operate within clearer rules.

In markets with mature monitoring frameworks, this has led to more predictable enforcement and reduced legal uncertainty for all parties involved.

Looking ahead, do you expect digital monitoring to become a standard part of STR regulation across Europe, or will adoption remain uneven between countries?

Digital monitoring is increasingly seen as a necessary component of effective STR regulation, particularly in high-demand destinations. While adoption will not be uniform in the short term due to differences in legal frameworks, administrative capacity, and political priorities, the overall trajectory is clear.

As short-term rentals continue to operate as a cross-border digital market, authorities will need scalable, data-driven tools to ensure compliance, protect housing stock, and secure public revenues. Over time, this will make digital monitoring less of an exception and more of a baseline requirement.

The experience in regions that adopted these systems early shows that technology, when combined with clear regulation and institutional oversight, enables a more balanced and sustainable short-term rental ecosystem.