Belgium’s state secret case targets "disposable agent"

The profile is designed to vanish. A person with loose ties to a foreign power, recruited for one task, told almost nothing about the wider operation, discarded the moment something breaks. Intelligence professionals call this a "disposable agent."

Belgian prosecutors recently detained a 46-year-old man on suspicion of passing state secrets. Belgian media described the case as the country's first wegwerpagent — disposable agent — investigation. The public record is thin: no charge sheet, no named handler, no identified secret. The arrest matters less for the Belgian file than for the pattern it fits across the continent.

A Cruder Method Born of Expulsion

After Russia's full-scale invasion of Ukraine, European governments expelled hundreds of Russian diplomats suspected of intelligence work. Classic espionage had depended on officers under diplomatic cover who could recruit sources while shielded by immunity. With fewer such officers in place, Moscow faced a practical gap.

Former intelligence officials describe what replaced it as cruder and more reckless: remote handling through encrypted apps, recruitment via social media, and operatives used once and discarded (Telegraph). Belgian intelligence services have expanded their use of special surveillance methods as espionage and organised crime increasingly overlap (Belga).

Security services across Europe can see this shift. Proving it in court is a different problem. Each country prosecutes under its own rules, with its own evidence standards, while disposable agents are chosen precisely because they leave little trail. The gap between spotting a pattern and building a case is where the method survives.

Poland Shows How It Works

Poland offers the strongest public evidence. Last week, ABW (Poland's Internal Security Agency) detained eleven people accused of recruiting and paying participants in demonstrations within the Ukrainian refugee community (Rzeczpospolita, Interia). The alleged method fits the pattern: local intermediaries exploiting politically sensitive themes for small disruption with little trail.

The Polish dossier extends further. Three citizens face espionage charges, with prosecutors alleging intelligence work for Russia and reconnaissance of NATO deployments. ABW has also investigated alleged cross-border sabotage coordinated through Eurojust (the EU agency that connects national prosecutors). The Russian command chain remains unproven in court. But the range of allegations in a single country is hard to dismiss.

Germany shows what the targets look like. In April 2024, two German-Russian suspects were arrested for allegedly scouting US military facilities and transport infrastructure for sabotage (Reuters). German security reporting describes surveillance of military transports carried out by low-level helpers, not trained officers (Tagesschau). Estonia's security services warn of proxy recruitment through Telegram and operations designed so investigators struggle to prove who ordered them (KAPO).

Who Can Actually Prosecute

The disposable-agent method crosses borders. The institutions that respond to it mostly do not. National security services investigate. National prosecutors need courtroom-grade evidence. Europol coordinates police work across countries but does not bring charges. The European Commission recently proposed strengthening both Europol and Eurojust to handle cross-border threats from hostile states (European Commission). NATO supports allied resilience through counter-hybrid teams but has no role in prosecution (NATO).

Poland has prosecutor-level allegations. Germany has formal investigations. Belgium has a single detention. Connecting those into one prosecutable picture requires cross-border cooperation that Europe is still building.

The Belgian suspect will likely disappear from the news. Disposable agents are meant to be forgotten. Until the gap between intelligence pattern and courtroom proof narrows, the method keeps its advantage.