Dunamu, the operator of South Korea's crypto exchange Upbit, has filed an appeal against the Financial Intelligence Unit (FIU) to overturn a business suspension order. The FIU imposed the suspension due to Dunamu's failure to meet regulatory obligations, including customer verification and transaction reporting. The suspension restricts new customer transactions from March 7 to June 6, 2025, but allows existing customers to continue trading. Dunamu seeks to halt the sanctions and has requested a stay of execution from the Seoul Administrative Court. The FIU also issued warnings and disciplinary actions against Dunamu's executives. This action comes amid increased scrutiny of crypto platforms in South Korea, contrasting with the US SEC's recent easing of regulations.

HIGHLIGHTS Upbit operator Dunamu files an appeal against the Financial Intelligence Unit.  The FIU recently restricted Dunamu from new customers' crypto trading activities. Dunamu's lawsuit seeks to overturn the FIU's business suspension order.  South Korean crypto exchange Upbit’s operator, Dunamu, has challenged the sanctions imposed by the Financial Intelligence Unit (FIU) by filing an appeal with the Seoul Administrative Court. As part of the legal action, Dunamu filed a lawsuit seeking to overturn the business suspension order and to halt the execution of the sanctions.
Upbit Operator Dunamu Seeks to Halt FIU’s Sanctions, Files Lawsuit
In a recent development, Dunamu, South Korean crypto exchange Upbit’s operator, filed an appeal against the Financial Intelligence Unit. The appeal seeks to cancel the business suspension order imposed by the FIU. In addition, the platform requests the court for a stay of execution, halting the implementation of the agency’s disciplinary actions.

Keeping specific details undisclosed, a Dunamu official stated,
We made a careful decision, and it is difficult to talk about the specific details…We will faithfully explain during the trial.
Dunamu Faces Business Suspension Order over Regulatory Obligations
Recently, South Korea’s FIU announced disciplinary actions against Dunamu citing its failure to meet key regulatory obligations. On Tuesday, the agency asked the platform to end business operations for three months. As part of the development, Dunamu would face restrictions on new customers’ crypto transactions.

In detail, the regulator banned Dunamu from facilitating new users to transfer cryptocurrencies from and to other exchanges from March 7 to June 6, 2025. However, the platform’s existing customers could continue trading activities during the suspension period.

Along with the business suspension order, the FIU also took disciplinary actions against Dunamu's executives. Notably, the regulator sent a warning to CEO Lee Sirgo and dismissal orders or cautions for eight other employees.

Notably, South Korea’s increasing scrutiny over crypto platforms comes amid the US SEC’s loosened regulations. Recently, the SEC dropped multiple crypto lawsuits involving Coinbase, Robinhood, Uniswap, and Tron Foundation.
Upbit’s Crypto Regulatory Violations: Insights
Significantly, the FIU alleged Upbit and its operator breached several key regulations, including virtual asset transaction rules, customer verification requirements, and suspicious transaction reporting mandates. In particular, the regulator found Dunamu facilitating over 45,000 crypto transactions with 19 unregistered overseas virtual asset service providers.

In addition, the platform failed to adhere to the customer verification rules on a massive scale. In January, the FIU suspended Upbit’s operations, citing Know-Your Customer (KYC) violations. The agency also warned the company over violating the Specific Financial Transaction Information Act.

Dunamu Appeals Against FIU's Business Suspension Order on Upbit