Turkey Opens Thodex Probe as Exchange Users Lose Access

Istanbul’s Anatolian Chief Public Prosecutor’s Office opened an investigation into cryptocurrency exchange Thodex on April 22, 2021, after allegations that events at the platform had harmed numerous customers. The prosecutor’s exact-date statement said investigators were working to identify potentially criminal acts and those responsible.

The development turned an exchange outage into a formal law-enforcement matter. It also exposed a basic distinction that could be obscured during the cryptocurrency market’s 2021 expansion: ownership recorded inside a centralized trading platform was dependent on that platform honoring withdrawals and maintaining access. A blockchain could continue operating while customers remained unable to reach assets credited to exchange accounts.

From maintenance notices to an investigation

Contemporaneous reporting by Anadolu Agency said Thodex’s website had been inaccessible for two days. The exchange had initially attributed the disruption to planned maintenance expected to last six hours, then said maintenance would take four or five days while it pursued a partnership. Customers reported that withdrawal problems had begun before the complete interruption.

By April 22, prosecutors were taking statements from company employees and cybercrime officers were searching an office associated with Thodex in Istanbul’s Kadıköy district. Turkey’s Financial Crimes Investigation Board, known as MASAK, had also begun examining the company and the responsible person. Anadolu reported, based on information from MASAK, that the authority had blocked Thodex accounts held at Turkish financial institutions as of April 21.

Those actions were verified institutional responses, but they did not establish the scale of any loss or prove the criminal allegations. A complaint described by Anadolu asserted that the exchange had approximately 400,000 members, including about 390,000 active users. Those figures came from a complainant, not from an audited customer ledger or the prosecutor’s April 22 statement, and therefore remained allegations rather than verified measurements.

What remained uncertain on April 22

The amount of customer property held by Thodex was not reliably established on April 22. Large loss estimates circulating publicly could not be reconciled with audited financial statements, bank records or a verified inventory of customer crypto assets. The prosecutor announced an investigation, not a finding of fraud or a final accounting.

Reports also alleged that founder Faruk Fatih Özer had left Turkey on April 20. On April 22, that claim was part of the developing case rather than a fact established in the prosecutor’s first statement. Thodex’s position was that operations had been suspended while it investigated abnormal movements in company accounts and conducted partnership discussions. Customers, meanwhile, could not independently test those explanations through normal platform access.

The defensible event-day conclusion was consequently narrow: a significant centralized exchange was inaccessible, customers alleged they could not withdraw funds, and two Turkish authorities had begun taking protective and investigative measures.

A regulatory system under pressure

The case arrived during an abrupt change in Turkey’s treatment of digital assets. A Central Bank of the Republic of Turkey regulation published on April 16 prohibited the direct or indirect use of crypto assets in payments and barred payment and electronic-money institutions from intermediating transfers to or from crypto trading, custody, transfer and issuance platforms. It was scheduled to take effect on April 30.

That measure was not a blanket prohibition on owning or trading cryptocurrency. Nevertheless, it narrowed the payment rails available to the sector and demonstrated that policymakers were moving faster than the supervisory framework surrounding exchanges. The Thodex investigation raised a separate custody and consumer-protection problem: what safeguards applied when an exchange controlling customer access became unreachable?

For the industry, April 22 illustrated that market adoption and operational trust were not interchangeable. High customer counts, promotional campaigns or reported trading activity did not substitute for independently verified reserves, segregated custody, withdrawal continuity or a clear insolvency process.

Later-confirmed context

In a second statement dated April 24, the prosecutor said official records confirmed that Özer left Turkey on April 20 and that no activity was found at the company’s official addresses. That later confirmation clarifies the April 22 record but does not retroactively validate the customer-count or loss estimates circulating when the investigation began.