Bithumb faces FIU sanctions after notice over AML/KYC

Bithumb faces FIU penalties; fines may top Upbit’s ₩35.2B

south korea’s Financial Intelligence Unit (FIU) has issued Bithumb a preliminary notice proposing a six-month partial business suspension over anti-money laundering (AML) and Know Your Customer (KYC) failures, including suspected dealings with overseas virtual asset service providers (VASPs) not registered in Korea and inadequate customer due diligence such as weak identity and address checks. Monetary penalties are described as potentially in the “tens of billions” of won and could exceed the ₩35.2 billion imposed on Upbit, as reported by Financial News (https://en.fnnews.com/news/202603091908367363?utm_source=openai).

In scale terms, estimates published by Coin Edition suggest the fine could reach up to ₩50 billion (about $36.5 million), contingent on the scope of violations confirmed through the review. Those figures would place Bithumb’s penalty clearly above Upbit’s, though outcomes remain subject to the sanctions-review process (https://coinedition.com/south-korea-to-suspend-bithumb-for-6-months-over-kyc-gaps/?utm_source=openai).

Why regulators cite AML/KYC violations and unregistered VASP dealings

The case centers on compliance gaps regulators flagged in customer due diligence, including identity verification and address checks, alongside transactions linked to overseas VASPs that lack domestic registration. Such deficiencies elevate risks of illicit flows and contravene the obligation to assess counterparties’ regulatory status.

These risk factors typically trigger closer scrutiny because they weaken controls designed to detect and deter money laundering. Where unregistered counterparties are involved, domestic authorities cannot rely on home-jurisdiction supervision, amplifying exposure.

Industry observers describe the alleged breaches as serious and say monetary penalties under consideration are substantial, potentially surpassing Upbit’s prior fine, according to AML Network (https://amlnetwork.org/aml-news/bithumb-faces-six-month-suspension-as-korean-regulators-cite-serious-aml-breaches/?utm_source=openai).

Legal academics view the discussion of license-based measures as a strong signal of regulatory concern before any final decision. “License-based sanctions are the ‘nuclear option,’ used only for exchanges showing systemic failures or intentional misconduct,” said Park Ji-hoon, Professor of Financial Law, via MEXC.com (https://www.mexc.com/news/668341?utm_source=openai).

What a six-month partial suspension could mean for users

If imposed, a partial suspension would likely restrict certain business lines for a defined period while others continue, with exact scope set in the final decision. Users could experience tighter onboarding checks or service limitations during the suspension window, depending on the terms regulators specify.

Operational continuity would hinge on the sanctioned activities identified by the review. Further clarity would be expected in any official notice setting out which services pause and which remain available.

Sanctions review process, timeline, and how challenges could proceed

Sanctions in this case are moving through a formal review track. Before any penalties take effect, a committee review is expected to assess findings, proposed measures, and proportionality, after which a final decision could be confirmed. Public details on potential challenge mechanisms were not specified in reports.

FIU and FSC roles in sanctions-review committee decisions

The FIU issued the preliminary notice and is set to convene a sanctions‑review committee as part of the process, as reported by Seoul Economic Daily (https://en.sedaily.com/news/2026/03/09/south-koreas-fiu-notifies-bithumb-of-6-month-partial?utm_source=openai). The Financial Services Commission (FSC) is referenced alongside the FIU among regulators signaling the potential for both operational restrictions and a significant monetary fine.

Expected sequencing from preliminary notice to final sanction

The expected sequence runs from the preliminary notice to a sanctions‑review committee deliberation and then, if confirmed, to a final sanction. Measures under consideration include monetary penalties in the tens of billions of won and a six‑month partial suspension.

FAQ about Bithumb fine

What AML/KYC failures did South Korean regulators cite at Bithumb?

Deficient customer due diligence, identity verification and address checks, and suspected dealings with overseas VASPs not registered in Korea.

Will Bithumb face a six-month partial suspension, and when would it begin?

A six‑month partial suspension was proposed. Any start date would depend on the sanctions‑review committee’s outcome and subsequent confirmation.