A prominent Polish Fintech executive is currently held in a Missouri county jail. U.S. authorities arrested him on an Interpol warrant, as Poland seeks his extradition to face serious charges of fraud and money laundering that allegedly harmed thousands of clients. Marcin Pióro, 45, was taken into custody at Fort Leonard Wood and booked into the Christian County Sheriff’s Office on May 19, 2026. He faces no local criminal charges in the United States.
Instead, federal prosecutors in the Western District of Missouri filed a complaint this week to facilitate his transfer under the US-Poland extradition treaty.
A magistrate judge will now review the request while he remains detained.
Pióro previously led key operations at Cinkciarz.pl, a major online currency exchange platform he joined in 2010 as president of the management board.
He also held influential positions at related entities, including Conotoxia—a licensed domestic payment institution—and its parent holding company.
Polish investigators claim that from around 2020 through late 2024, he and associates systematically misled customers.
They allegedly encouraged deposits into mobile wallets with assurances that funds would stay accessible for trading or withdrawals.
Instead, authorities assert, client money was diverted to support other businesses within the Conotoxia group, including ventures in Cyprus and the United States, and to settle prior debts.
At least 2,396 affected customers have been identified so far, with combined losses reaching approximately $30.14 million across more than a dozen currencies.
Polish officials report receiving around 7,000 public complaints and interviewing hundreds of witnesses during their probe.
Trouble surfaced publicly in mid-2024 when clients encountered delays in processing exchanges. By October 2, Poland’s financial regulator revoked Conotoxia’s payment services license.
Despite evident liquidity shortages, the platform reportedly kept accepting deposits.
Thousands of pending transactions went unfulfilled in the following months due to insufficient bank balances. Investigators later froze hundreds of related accounts.
Court filings portray Pióro as a central figure in financial decision-making.
Witnesses, including a cooperating former chief accountant, described how customer deposits were treated as available “advances” for company and group needs.
Allegations extend to personal misuse, such as funding luxury items, vacations, and other expenses.
An external auditor reportedly declined to sign off on earlier financials after noting red flags like large bonuses and loans to Pióro totaling millions of dollars.
After regulatory intervention, Pióro allegedly directed further transfers, including substantial sums to his personal US accounts.
He is also accused of attempting to shield assets by transferring properties worth over a million dollars to family members and shifting shares to a foundation where he serves as founder and sole beneficiary.
He reportedly left Poland in October 2024 and entered the U.S. from Switzerland in early 2025. A Polish court issued a detention order in July 2025.
U.S. Marshals, working with the FBI and other agencies, executed the arrest. Officials highlighted the collaborative effort to apprehend him.
Pióro reportedly joined the US Army seeking naturalization sponsorship. Authorities are requesting he be held without bond during extradition proceedings.
This development underscores vulnerabilities in fintech platforms handling currency exchanges and payments, especially when rapid growth meets weak oversight.
For thousands of customers, what began as convenient digital wallets turned into significant financial harm. The case highlights ongoing international cooperation in pursuing alleged white-collar fugitives.
