Iran barred financial institutions from cryptocurrency dealings

Iran’s central bank announced on April 22, 2018, that banks, credit institutions and currency exchanges were prohibited from handling cryptocurrency transactions. The directive covered bitcoin and other virtual currencies and warned regulated institutions against buying, selling, facilitating or promoting them.

The development mattered because it placed cryptocurrency inside a broader effort to tighten control over Iran’s financial system. It also narrowed an important distinction in the event-day record: the measure targeted regulated financial institutions and exchange businesses. The surviving reports did not establish a comprehensive prohibition on individuals possessing cryptocurrency, operating blockchain software or transferring assets without a regulated intermediary.

A banking restriction, not a blockchain shutdown

Reuters reported on April 22 that Iran’s state news agency, IRNA, had quoted a central-bank circular instructing banks, credit institutions and currency exchanges to avoid cryptocurrency sales, purchases and promotional activity. Xinhua separately reported from Tehran that the directive applied to all banks and credit institutions and exposed violators to disciplinary action under existing regulations.

Those accounts indicate that the operative pressure point was institutional access. Banks and licensed exchange businesses connect customers to the domestic payment system and the rial. Restricting those entities could make conversion between cryptocurrency and conventional money more difficult even without disabling cryptocurrency networks themselves.

Bitcoin transactions did not require approval from Iran’s central bank, and the directive could not alter Bitcoin’s ledger or prevent blocks from being produced outside Iran. Its practical reach instead depended on the central bank’s authority over supervised institutions, their compliance and enforcement inside the country. The public evidence available on April 22 did not quantify how many institutions had been providing cryptocurrency services or how much activity the restriction affected.

The decision preceded the announcement

The April 22 announcement did not describe a policy conceived that day. Xinhua said the underlying decision had been taken at the thirtieth meeting of Iran’s High Council on Anti-Money Laundering. A later Law Library of Congress review dated that decision to December 30, 2017, while identifying April 22, 2018, as the central bank’s official announcement.

That chronology is important. April 22 marks the date the restriction entered the widely documented public record, not necessarily the date every underlying policy choice was made or communicated within Iran’s banking system.

The central bank cited risks involving money laundering and terrorism financing. Those concerns existed within an active international compliance process. On February 23, 2018, the Financial Action Task Force said Iran’s anti-money-laundering and counter-terrorist-financing action plan had expired with most items incomplete. FATF continued suspending countermeasures but said it would reassess Iran’s progress in June 2018 and urged enhanced due diligence in financial relationships involving Iran.

FATF’s statement did not order Iran to ban cryptocurrency. It independently verifies the compliance pressure surrounding Iranian financial policy before the central bank’s announcement. Treating the cryptocurrency directive as a direct FATF requirement would go beyond the available record.

Currency controls shaped the context

The directive also arrived during acute pressure on Iran’s conventional currency market. Reuters reported that Iran had moved during April 2018 to unify official and open-market exchange rates and had prohibited money changing outside banks after the rial fell sharply. Cryptocurrency therefore intersected with two institutional priorities: controlling channels for currency conversion and addressing perceived financial-crime risks.

The timing supports viewing the restriction as part of a wider financial-control campaign, but it does not prove that cryptocurrency activity caused the rial’s decline or that the directive materially changed global bitcoin prices. No sufficiently documented event-day market dataset reviewed for this reconstruction isolates such an effect.

What remained uncertain on April 22

The surviving English-language record does not preserve the full original central-bank circular, its distribution list or implementation guidance. It also does not establish immediate enforcement actions, customer-account closures or a measured decline in Iranian cryptocurrency activity on April 22. The defensible conclusion is narrower: Iran publicly barred supervised financial institutions and currency exchanges from cryptocurrency dealings, tightening institutional access without demonstrating that decentralized networks or all private use had been prohibited.