Zondacrypto: Detecting Exchange Insolvency Before Public Collapse
The challenge: By early 2026, Zondacrypto – one of the oldest and most popular among Poles crypto exchanges – was showing two parallel signals. Sporadic complaints about delayed or blocked withdrawals had appeared on its Polish-language Telegram channel since December 2025, increasing steadily from January onwards while remaining absent from the exchange’s global and Italian-language channels. Members of our team placed test withdrawal orders: smaller orders went through; a larger BTC withdrawal initiated on April 1 sat in “pending” status for over fourteen hours and was eventually cancelled. Detecting balance-sheet failure at a regulated counterparty – before withdrawals freeze, regulators intervene, and media coverage breaks – requires combining multi-provider on-chain analytics, proprietary attribution data, sustained off-chain monitoring, and field intelligence from inside the local industry. Few institutions exposed to exchange counterparties can justify assembling this stack internally for every venue they touch. Recoveris ran the investigation independently, with the findings published through money.pl on April 6, 2026.
Our approach: We ran three parallel streams of inquiry, each cross-checking the others.
The on-chain stream traced flows across six blockchains (Bitcoin, Ethereum, Polygon, Arbitrum, Avalanche, Optimism), reviewing Zondacrypto’s wallet clusters as labelled by the major analytics providers and looking for outflows to cold storage or external venues. Approximately one million addresses were reviewed in total. We combine seven blockchain analytics providers with our own attribution database, giving coverage comparable to top-tier law enforcement agencies outside the United States.
The off-chain digital stream involved continuous scraping of Zondacrypto’s official Telegram channel from December 2025 onwards, monitoring of user reports on X, and tracking the exchange’s own communications over time.
The field-intelligence stream came from industry events and direct conversations within the Polish crypto community: withdrawn sponsorships, unpaid invoices to event organisers, and weak presence at conferences where the exchange would normally be visible.
Outcome: Two findings carried the investigation. First, the monthly average BTC balance on Zondacrypto’s main labelled BTC cluster fell from a peak of 55.7 BTC in August 2024 to 0.18 BTC in March 2026 – a 99.7% decline. The daily balance stayed below 1 BTC every day of March 2026, and below 0.5 BTC on 27 of the 31 days. The balance on April 1 was 0.086 BTC, roughly $9,700. For context, peer European exchanges of comparable size held an average of 308 BTC across their main BTC hot wallets (range 50-600 BTC); even Kuna, an exchange operating from a country in active armed conflict, held roughly 10 BTC.
Second, between mid-December 2025 and April 2, 2026, we identified 511 transfers from Zondacrypto wallets to a single Kraken-controlled deposit address, totalling approximately $21M (roughly 76M PLN). The transfers spanned thirty different assets and crossed all six analysed chains, indicating systematic movement rather than a single technical operation.
The investigation was published by money.pl on April 6, 2026. Within twenty-two days, Zondacrypto’s website was offline, its CEO had reportedly left the country, the Polish government had held a press conference at the Prime Minister’s Office, and the Prosecutor’s Office had opened a criminal investigation under Article 286 §1 (fraud) and Article 299 (money laundering) – assigned to the Central Bureau for Combating Cybercrime. As of April 28, the prosecutor’s spokesman has confirmed over 700 registered victims and damages “certainly larger than 350M PLN ($96.4M).” According to the information published by the exchange, the victim was supposed to have around 1.3M customers (mostly from Poland).
The case demonstrates the value of combining multi-provider on-chain intelligence with off-chain and field signals to assess exchange health – capability institutions exposed to crypto counterparties cannot build alone but can access through Recoveris.
Detailed coverage: The Zondacrypto Investigation – Recoveris