WikiBit Exchange Exit Risk Rankings #49: KuCoin — Why Is an Exchange with World-Leading Proof-of-Reserves Transparency Repeatedly Facing Bans and Penalties?

Introduction: An “A-Student” Report Card on Regulatory Compliance

In the first 48 installments, we investigated a range of exchanges, from HashKey to MEXC. For Episode 49, we turn to one of the most strikingly contradictory cases: KuCoin.

In terms of transparency, KuCoin has delivered one of the most impressive performances in the crypto industry. Founded in 2017, it received a Proof-of-Reserves (PoR) transparency score of 96.7 out of 100 from CryptoQuant in 2025, ranking first globally. It has published Merkle tree-based Proof-of-Reserves reports for more than 39 consecutive months, undergone third-party verification by Hacken, and held a 6.69% share of the global spot market in Q1 2026, placing it among the world's top three exchanges.

But there is another side to the story.

On October 13, 2026, South Korea's Financial Intelligence Unit (FIU) officially blocked access to KuCoin's website, extending restrictions beyond its app to the web platform. The UK's Financial Conduct Authority (FCA) listed KuCoin as an unauthorized firm. In January 2025, KuCoin pleaded guilty to charges brought by the U.S. Department of Justice (DOJ), agreeing to pay more than $297 million in penalties and admitting to receiving billions of dollars in suspicious funds between 2017 and 2024. The Commodity Futures Trading Commission (CFTC) imposed a separate $500,000 civil penalty and permanently prohibited KuCoin from serving U.S. users without the required registration.

How can an exchange ranked first globally for PoR transparency also be a regulatory underperformer, having been fined nearly $300 million by the U.S. Department of Justice, blocked in South Korea, and flagged by the UK's financial regulator？

Let's examine the evidence layer by layer.

1. Regulatory Compliance: A Perfect Score for PoR, but a Failing Grade for Compliance

KuCoin's Compliance Credentials: MiCA and AUSTRAC

KuCoin has not been entirely unsuccessful in its compliance efforts. In November 2025, it obtained a Markets in Crypto-Assets (MiCA) license through its Austrian subsidiary. It also completed registration with Australia's AUSTRAC, enabling it to operate payment and card-related services in compliance with applicable requirements in Europe and Australia.

However, regulatory authorization does not necessarily mean unrestricted permission to operate.

In February 2026, Austria's Financial Market Authority (FMA) imposed a new-business ban on KuCoin EU after the company lost key officers responsible for anti-money laundering and sanctions compliance. The ban was lifted on May 18, 2026, after the positions were filled. However, the FMA explicitly stated that KuCoin EU had still not received final authorization to fully commence operations because governance requirements and additional key management positions remained outstanding.

In other words, the license was in place, but final approval to launch full operations had not yet been granted.

U.S. DOJ: $297 Million in Penalties and a Guilty Plea

This was one of the most severe regulatory setbacks in KuCoin's history.

In January 2025, KuCoin pleaded guilty to charges brought by the DOJ, admitting to violations of the Bank Secrecy Act and operating an unlicensed money-transmitting business. Prosecutors alleged that KuCoin received billions of dollars in suspicious funds between 2017 and 2024 and concealed the fact that approximately 17% of its users were based in the United States.

KuCoin agreed to pay more than $297 million in penalties and withdraw from the U.S. market for at least two years.

In March 2026, the CFTC imposed a separate civil penalty of $500,000 and permanently prohibited KuCoin from offering services to U.S. users without registering as a foreign board of trade, as required.

South Korea's FIU: Website Access Blocked on October 13, 2026

On October 13, 2026, South Korea's Financial Intelligence Unit (FIU), following approval by the relevant communications standards review body, officially blocked website access to 27 unregistered overseas exchanges, including KuCoin.

Previously, the restrictions had primarily targeted app downloads. They were subsequently extended to web access.

Operating without the required registration in South Korea can carry a maximum penalty of five years in prison or a fine of up to 50 million Korean won.

UK's FCA: Listed as an Unauthorized Firm

The UK's Financial Conduct Authority has included KuCoin on its warning list of unauthorized firms, advising British consumers to avoid dealing with the platform.

Users in the UK may not have access to the Financial Ombudsman Service or protection under the Financial Services Compensation Scheme when dealing with an unauthorized firm.

India's FIU: Show-Cause Notices

India's Financial Intelligence Unit issued show-cause notices to nine offshore virtual asset service providers, including KuCoin, over alleged violations of the Prevention of Money Laundering Act.

Corporate Registration: Seychelles, Another Offshore Jurisdiction

KuCoin is registered in Seychelles and maintains offices in Hong Kong and Singapore.

The exchange explicitly restricts access from major markets, including the United States, the United Kingdom, Canada, and Singapore. Japan's Financial Services Agency has requested that app stores remove its app. In Turkey, KuCoin operates a localized platform, KuCoin TR, and has been pursuing licensing. In India, it was previously fined by the FIU, while its subsequent registration status has changed over time.

Risk Rating: High Risk — Regulatory Compliance

Being ranked first globally in PoR transparency does not contradict the fact that KuCoin has faced a $297 million DOJ settlement, a website block in South Korea, an FCA warning, and regulatory notices in India.

Both realities can exist simultaneously.

KuCoin has invested heavily in demonstrating that its assets are backed by reserves. But when it comes to demonstrating compliance with the laws and regulatory requirements of major markets, its record tells a very different story.

2. Account Security and Withdrawals: A $2.8 Million “System Error” and Endless “Standard Reviews”

Canadian User: CAD 2.8 Million Frozen After a Withdrawal

In July 2025, a Canadian user reportedly had their KuCoin account frozen after making a large withdrawal.

KuCoin initially described the situation as a “standard precautionary review.” In a subsequent email, however, the exchange reportedly acknowledged that a “system error” had caused the freeze.

The user submitted KYC documents, bank statements, and proof of the source of wealth. Nevertheless, the process dragged on for months, with communication seemingly trapped in a cycle of delays and further delays.

When the user sought help on social media, KuCoin's official account publicly denied that the problem existed and threatened legal action against the user, even though private email correspondence had reportedly acknowledged an internal system error.

KuCoin's public response presented a different version of events. The exchange stated that the UID had been deleted approximately six months earlier, the support ticket had been resolved and closed, and the withdrawal had been completed. It also claimed that no assets remained in the account when it was deleted.

The user publicly disputed this account, describing the response as “gaslighting” and sharing screenshots of previous communications.

The two sides offered sharply conflicting accounts of the same incident.

Reddit Complaints: “Funds Locked, No Updates”

In February 2026, multiple KuCoin users reported withdrawal problems on Reddit and X.

One user claimed that a withdrawal initiated in December 2025 had been repeatedly blocked and that the funds remained locked two months later, with no updates or explanation from KuCoin.

KuCoin responded that it did not freeze user accounts or prohibit users from disposing of their assets, adding that it was communicating with the affected user to resolve the issue.

Institutional Account: “No Timeline for Resolution”

One Trustpilot reviewer complained:

“KuCoin froze my institutional account without providing any timeline for resolution. They are withholding 28,000 USDT without explaining when, or whether, the funds will be released.”

For institutional clients, prolonged uncertainty over access to funds can create operational and liquidity risks beyond the immediate inconvenience of a withdrawal delay.

Trustpilot: 81% One-Star Reviews, with Ratings Suspended Over Fake Reviews

KuCoin has received 1,484 reviews on Trustpilot, with 81% reportedly giving it one star. Its rating has also been suspended over concerns about fake reviews.

Terms such as “Thievery,” “SCAM,” and “funds frozen” appear frequently in user complaints.

One user stated bluntly that KuCoin had initially allowed U.S. users to register and deposit funds, only to subsequently lock out every U.S. user.

These reviews are allegations and individual experiences, not independently verified proof that every reported incident occurred as described. Nevertheless, recurring complaints about frozen accounts, withdrawal delays, and inadequate communication deserve attention.

Risk Rating: High Risk — Withdrawals

A “system error” may be a genuine technical problem. But when an account remains inaccessible for months without a clear resolution timeline, the distinction becomes increasingly important to the affected customer.

KuCoin's withdrawal complaints show a pattern similar to those reported by MEXC: once an account enters a review process, users may face a lack of transparency and uncertainty over when their funds will be released.

The reported CAD 2.8 million case is particularly concerning. Large balances warrant stronger safeguards, not blind trust. The larger the amount involved, the more important it becomes to understand the exchange's review procedures, escalation channels, and withdrawal policies before depositing funds.

3. Proof of Reserves: In This Area, KuCoin Truly Is a Global Leader

CryptoQuant's 2025 Report: 96.7/100, Ranked No. 1

This is KuCoin's strongest card.

According to CryptoQuant's 2025 Exchange Leader report, KuCoin received a PoR transparency score of 96.7 out of 100, ranking first among major exchanges. It outperformed Bybit (93.2), Binance (75.2), and Coinbase (44.3).

KuCoin has published monthly reserve reports for more than 39 consecutive months, with reported reserve ratios exceeding 100% for all disclosed assets.

KuCoin's PoR system uses a Merkle tree structure, allowing users to independently verify whether their balances are included in the exchange's total liabilities. Hacken provides third-party verification.

The snapshot dated August 31, 2026, showed the following reserve ratios:

BTC: 107%

ETH: 117%

USDT: 111%

USDC: 123%

But PoR Still Has Its Limitations

First, PoR is a snapshot of asset coverage, not a full audit of liabilities.

A Merkle tree proves that a user's balance is included in the reported total liabilities. It does not prove that the platform has no off-balance-sheet liabilities.

An exchange can simultaneously report a BTC reserve ratio of 107% and have a user's CAD 2.8 million account frozen. The reserve ratio alone does not guarantee that the user can actually withdraw their funds.

Second, PoR covers only a limited range of assets.

KuCoin primarily publishes reserve data for core assets such as BTC, ETH, USDT, and USDC. The reserve positions of other listed tokens remain less transparent.

Third, strong PoR performance cannot compensate for weak regulatory compliance.

CryptoQuant's PoR score measures transparency; it does not assess licensing compliance, anti-money laundering enforcement, or user protection.

KuCoin has gone to great lengths to demonstrate that it has the assets to back customer balances. Yet when it comes to demonstrating compliance with the law, it has faced a DOJ case resulting in penalties of more than $297 million.

Risk Rating: Low Risk — PoR Transparency Only

KuCoin genuinely sets an industry benchmark in PoR transparency. That deserves recognition.

But PoR is a perfect score in one subject—financial transparency—not an overall score for platform safety.

4. Financial Strength and Trading Depth: A Top-Three Global Spot Market Share, but Suspicions of Wash Trading Persist

The Impressive Numbers

Global users: More than 45 million in the first half of 2026.

Q1 2026 spot market share: 6.69%, ranking among the world's top three.

Q2 2026 total trading volume: Approximately $490 billion, with market share rising from 2.83% in Q1 to 2.96%.

Futures open interest share: Increased from 2.23% to 6.20%.

CoinMarketCap-reported total assets: Approximately $3.5 billion.

But the Shadow of “Suspicious Trading Volume” Remains

Citing on-chain data, BTCC reported that approximately $40 billion in KuCoin's monthly trading volume may have constituted “suspicious trading,” accounting for roughly 27% of the total.

Such estimates should be treated cautiously unless the underlying methodology and data can be independently verified. Nevertheless, they raise a legitimate question about how much reported trading activity reflects genuine market demand.

The $2 Billion Trust Project

In April 2025, KuCoin launched its $2 billion Trust Project, a multiyear initiative covering five areas: security infrastructure, compliance and governance, transparency, user protection, and global operational resilience.

The company published a first-anniversary review in May 2026.

One important distinction: this is a commitment to multiyear investment, not a $2 billion insurance fund sitting in an account and immediately available to compensate users for losses.

Risk Rating: Medium Risk — Financial Strength

KuCoin's reported top-three global spot market share is a significant indicator of its market presence. However, concerns that approximately 27% of its trading volume may be suspicious should not be dismissed without examining the underlying evidence.

Trading volume, reported assets, and reserve ratios are useful indicators, but none independently guarantees that customer funds will always be accessible.

5. Internal Operations and Management: Johnny Lyu Is the Public Face, and the Founders Are Identifiable

KuCoin's core management team is relatively well documented, which is not always the case among the high-risk exchanges examined in this series.

However, the DOJ indictment specifically named two of the company's founders.

In March 2024, the DOJ brought criminal charges against KuCoin and its founders, Chun Gan and Ke Tang, including allegations involving violations of the Bank Secrecy Act and operating an unlicensed money-transmitting business. In January 2025, KuCoin pleaded guilty and agreed to pay more than $297 million in penalties.

The Founders: Pushed Out of the Spotlight

Michael Gan (Chun Gan), associated with the role of chairman, and Ke Tang were both identified as Chinese nationals. Following the U.S. case, they were barred from management roles under the terms of the resolution and stepped back from the public spotlight.

Johnny Lyu: The Public Face of KuCoin

Johnny Lyu joined KuCoin in 2017 and became CEO of KuCoin Global in March 2020.

He has served as the exchange's public-facing representative and is primarily associated with operations and business development. Products and initiatives launched during his tenure include Spotlight, Pool-X, and KuCloud.

He remains active as a CEO and public representative of the company.

The Founding Team and Early Funding

KuCoin's founding team included Michael Gan (Chun Gan), Eric Don, Top Lan, Kent Li, John Lee, Jack Zhu, and Linda Lin, among others.

In November 2018, KuCoin raised $20 million in Series A funding from IDG Capital, Matrix Partners, and Neo Global Capital.

BC Wong: A Compliance-Focused CEO

BC Wong took over as CEO on January 21, 2025. A Singaporean with a legal and compliance background, he previously served as KuCoin's chief legal officer.

The timing of his appointment, around the period of the U.S. guilty plea, signaled a shift toward professional management with a stronger emphasis on regulatory compliance.

KuCoin's Corporate Journey: China to Singapore, Seychelles, and Beyond

KuCoin's organizational and geographic footprint has evolved over time, with roots in China, a presence in Singapore, registration in Seychelles, and additional international entities.

Its regulatory history has also involved licensing setbacks and questions about authorization in different jurisdictions, including reported issues involving Seychelles and the Turks and Caicos Islands. Meanwhile, the company established a European entity in Vienna and opened a new office in Australia.

The founders' departure from the public spotlight following U.S. criminal proceedings, followed by the appointment of a CEO with a compliance background, is both a warning sign and a potential positive development.

The negative: the company's original compliance failures implicated its founders directly.

The positive: the exchange is now led by a professional executive with a legal and compliance background who can be held accountable for the company's future conduct.

Risk Rating: Medium Risk — Management and Team

KuCoin's identifiable management team and documented fundraising history compare favorably with exchanges whose leadership backgrounds are difficult to verify.

However, criminal charges against its founders, the company's guilty plea, and penalties approaching $300 million remain major red flags in any assessment of management risk.

6. Product Experience and Trading Depth: An Altcoin Giant, but Risk Controls Remain a Sword of Damocles

Product Experience: KuCoin's Core Competitive Advantages

KuCoin is known for its broad altcoin coverage and rapid token listings. It supports nearly 700 cryptocurrencies, forming the foundation of its “Altcoin Giant” positioning.

Spot trading fees start at 0.10% for both makers and takers on Class A tokens. Users can potentially reduce fees further through KCS holdings and higher trading-volume tiers.

Its product lineup includes spot trading, futures, P2P trading, cryptocurrency purchases by credit card, and KuCoin Pay.

But Product Strengths Come with Drawbacks and Risks

First, withdrawal reviews are the biggest source of uncertainty.

The reported CAD 2.8 million Canadian case and the wave of Reddit complaints suggest that large withdrawals or events flagged as “system errors” can leave users facing an opaque process with no clear resolution timeline.

Second, KuCoin has a history of security incidents.

2020: KuCoin suffered a hot-wallet private-key theft, resulting in losses of approximately $281 million. Some of the funds were subsequently recovered.

2023: KuCoin's official Twitter account was hacked, causing users to lose more than $22,600.

October 2026: Following an attack on the Cysic cross-chain bridge, KuCoin suspended CYS token deposits. The attacker reportedly bridged out approximately $727,000 worth of ETH.

Third, persistent allegations from ZachXBT deserve attention.

On-chain investigator ZachXBT has repeatedly accused KuCoin of failing to adequately assist victims and law enforcement. He has also described the exchange's team as “complicit” in connection with alleged illicit fund flows.

Among the cases he cited were more than $9.5 million allegedly laundered through over 150 KuCoin deposit addresses in connection with a fake Ledger application, as well as at least 25 KuCoin accounts reportedly processing $3.5 million connected to the Bitcoin Depot incident.

These are allegations that must be distinguished from independently established findings. Nevertheless, they raise questions about transaction monitoring, cooperation with investigations, and the effectiveness of the exchange's risk controls.

Risk Rating: Medium Risk — Product Experience

KuCoin offers a broad selection of altcoins, competitive trading fees, and a comprehensive suite of trading products. These are genuine competitive advantages.

However, product breadth and trading convenience do not eliminate the risks associated with withdrawal reviews, historical security incidents, and questions about the exchange's handling of suspicious transactions.

For users, the key issue is not simply whether KuCoin offers the tokens they want to trade. It is whether they can reliably access their funds when they need them.

7. Real Community Feedback: Caught by the Platform for Fake Reviews, a Poor Performer in User Reputation

Trustpilot: Publicly Flagged for Violating Its Guidelines

Trustpilot publicly issued a “violating guidelines” notice against KuCoin after detecting fake reviews and removed the exchange's overall rating.

Among the 1,484 reviews that remained, 81% were one-star ratings, while only 8% were five-star reviews.

Common complaints included unexplained account freezes, fees charged on dormant accounts, withdrawal difficulties, and P2P disputes.

Overall, user feedback is polarized, with some positive reviews praising KuCoin's low fees, extensive token selection, and trading bot features. However, customer support remains a recurring source of frustration.

Common complaints include:

Support tickets remaining unresolved for extended periods.

Automated bot responses instead of meaningful assistance.

Repeated requests for duplicate or irrelevant documents, including repeated rejections during video KYC verification.

Requests for excessive or repeated fees under the pretext of “releasing funds.”

Withdrawals that are allegedly never returned after failed bank transfers.

Accounts frozen over seemingly minor issues, such as device changes or suspected inactivity.

Being publicly flagged by a major review platform for fake reviews is, in itself, a significant mark against a company's integrity and governance.

Risk Rating: High Risk — Community Feedback

8. Overall Exchange Exit Risk Assessment

Overall Rating: High Exchange Exit Risk

KuCoin is one of the most contradictory cases in this series: an extreme split between outstanding performance in one area—transparency—and serious shortcomings in another—regulatory compliance.

Its risk profile has five defining characteristics.

1. Its PoR performance is genuinely outstanding.

CryptoQuant's global No. 1 ranking, more than 39 consecutive months of reports, Hacken verification, and user-verifiable Merkle tree proofs place KuCoin at the forefront of industry transparency. This achievement deserves objective recognition.

2. Its regulatory compliance record raises serious concerns.

The DOJ guilty plea and $297 million in penalties, South Korean website block, FCA warning, Indian FIU notice, and restrictions on KuCoin EU's operations paint a troubling picture.

These are not simply isolated issues in one market. They reflect regulatory challenges across multiple major jurisdictions.

3. Withdrawal reviews present a recurring risk pattern.

The reported CAD 2.8 million Canadian case, the wave of Reddit complaints, and institutional account complaints involving no clear resolution timeline illustrate the potential gap between reported reserves and actual access to funds.

A BTC reserve ratio of 107% does not guarantee that your account will never be frozen over a “system error.”

4. Criminal charges against the founders add a distinct layer of risk.

This is different from the risk associated with an anonymous management team. KuCoin's leadership is identifiable, but the documented record includes criminal charges against its founders and a guilty plea by the company.

5. Its security record is not incident-free.

The $281 million theft in 2020, the 2023 Twitter account compromise, and the suspension of CYS deposits following the 2026 Cysic bridge incident highlight the importance of examining historical security vulnerabilities rather than assuming the platform is immune to future incidents.

The central issue is not simply whether KuCoin has a high exchange exit risk rating. It is that an exchange can rank first globally in PoR transparency while facing restrictions in multiple major markets and reports of withdrawals being frozen over alleged “system errors.”

That contradiction is precisely what users need to understand.

9. Recommendations for New and Existing Users

For New Users

1. Approach with caution.

KuCoin is not an obviously dubious platform with no verifiable credentials. It has a globally leading PoR transparency score, a top-three spot market share, and an identifiable management team.

But the DOJ guilty plea and $297 million in penalties, the South Korean website block, and the reported CAD 2.8 million withdrawal-related freeze raise three serious concerns.

Are the potential benefits worth taking that risk？

2. If you decide to try it, test the entire process with a small amount first: deposit → trade → withdraw.

Pay particular attention to withdrawals. Start with a small test withdrawal, confirm that the withdrawal process works normally, and only then consider increasing your balance.

The reported Canadian case involving CAD 2.8 million illustrates why users should not assume that accessing a large balance will be as straightforward as making a small withdrawal.

3. Never store money you cannot afford to lose access to.

KuCoin's withdrawal review process is a real concern, and there is no guarantee of a publicly specified resolution timeline for every case.

Keep only funds you can afford to have tied up or potentially lose.

4. If you live in a restricted jurisdiction, understand the consequences before using the platform.

Users in jurisdictions where KuCoin restricts its services, including the United States, the United Kingdom, and South Korea, may face account restrictions and may not have access to the protections they expect. Check the latest terms of service and local regulations before depositing funds.

For Existing Users

1. Reassess your exposure.

If more than 10% of your total assets are held on KuCoin, consider gradually reducing that concentration.

This is not a prediction that the exchange will collapse tomorrow. Rather, regulatory pressure and recurring reports of withdrawal restrictions create overlapping risks that deserve active management.

2. Do not wait until you have made a profit to withdraw.

One key lesson from the reported Canadian case is that large withdrawals may trigger additional scrutiny.

Withdraw funds periodically instead of leaving profits on the platform indefinitely.

3. Preserve all evidence.

If your account is frozen, retain all email correspondence, transaction records, KYC submission records, and support ticket histories.

The Canadian user was able to publicly challenge KuCoin's claim that the account had already been deleted partly because they retained screenshots of previous communications.

4. Monitor PoR, but do not treat it as a guarantee of safety.

KuCoin's PoR transparency is among the industry's best. But PoR demonstrates asset coverage, not a guarantee that withdrawals will be processed, and certainly not regulatory compliance.

An exchange reporting a BTC reserve ratio of 107% can still freeze your account over a “system error.”

5. Avoid adding large amounts of new funds.

This may be the simplest and most important piece of advice.

The Bottom Line

Who might KuCoin suit？

Active traders seeking broad altcoin coverage who value PoR transparency and are willing to accept the risks associated with withdrawal reviews.

Who should be particularly cautious？

Users holding large balances on the exchange, for whom the reported CAD 2.8 million case serves as a warning.

Users who prioritize strong regulatory protections and compliance.

Users in jurisdictions where KuCoin's services are restricted or unauthorized.

KuCoin's position is deeply contradictory.

It has achieved world-leading results in demonstrating that its assets are backed by reserves, yet the U.S. DOJ imposed nearly $300 million in penalties following its guilty plea. It has a top-three global spot market share, yet its website has been blocked in South Korea. Its management team is identifiable, yet its founders faced DOJ criminal charges and the company pleaded guilty.

KuCoin is like a merchant with impeccably maintained books, able to demonstrate the reserves behind every recorded balance. Yet law enforcement has already imposed nearly $300 million in penalties over allegations involving its handling of money it should not have processed.

Transparency can demonstrate what an exchange holds. It cannot, by itself, establish that the exchange complies with the law, protects every customer, or will always let users withdraw their funds.

Coming Next: WikiBit Exchange Exit Risk Rankings #50 — Gate. Stay tuned!

Risk Disclaimer: This article reflects the author's analysis and does not constitute investment advice. Cryptocurrency investments involve substantial risks. Please exercise caution before investing.

Information in this article was last updated on October 27, 2026. Please cross-check the latest information against multiple sources before making any decisions.

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