Bank of Thailand and SEC audit high-volume USDT flows in

Thailand’s central bank is coordinating with the country’s securities regulator to audit high-volume stablecoin transactions, explicitly including USDt (USDT), as part of a broader anti–money laundering push. The same package expands monitoring of large cash deposits, currency exchange behavior, and gold bullion trading tied to “gray money” flows.

Key Takeaways

High-volume stablecoin activity is being audited by the Bank of Thailand and the Thai SEC, with USDt (USDT) explicitly named alongside cash and FX channels.
Commercial banks face expanded compliance duties covering cash networks, currency exchanges, gold bullion trading, and “suspicious stablecoin transactions.”
Cash deposits above 5 million baht ($150,000) now trigger full disclosure, and high-value cash activity requires source-of-funds documentation.
Crypto trading remains legal while digital asset and stablecoin payments are still described as outlawed, with USDT/THB cited as the most popular pair on Bitkub.

Bank of Thailand and SEC Put High-Volume USDT Flows Under Audit

Thailand’s anti–money laundering (AML) push is no longer treating stablecoins as a side topic. The Bank of Thailand is working with Thailand’s Securities and Exchange Commission to audit high-volume stablecoin transactions, explicitly focusing on USDt (USDT), while also scrutinizing cash transactions and currency exchanges to identify and stop illicit financial flows.

The policy framing matters for traders. By naming USDT in the same breath as cash and FX, regulators are signaling they see stablecoins as a parallel rail for “gray money” rather than a separate, crypto-only compliance lane.

Bank of Thailand Governor Vitai Ratanakorn described the effort as ongoing, not episodic: “The measures we are implementing are not short-term fixes. They require the continuous deployment of multiple parallel strategies,” he said, in comments attributed to local media.

The target is Thailand’s “gray economy,” described as largely cash that may originate from suspicious sources, including scam call centers that have proliferated in the region. While there are no reliable figures for the total size of the gray economy, cited 2025 figures put scam losses at 115 billion THB ($3.4 billion) with around 173 million scam calls and texts recorded.

New Compliance Hooks: 5M Baht Cash Deposits, Source-of-Funds, and Banknote-Swap Monitoring

The operational tightening is concentrated at the regulated rails. Measures expand commercial bank compliance duties across cash networks, currency exchanges, gold bullion trading, and “suspicious stablecoin transactions.”

Concrete hooks are now spelled out. High-value cash transactions will require a source-of-funds declaration, and cash deposits above 5 million baht ($150,000) require full disclosure. Regulators also plan to monitor exchanges of large volumes of big banknotes into smaller denominations when there is no clear business reason.

For market participants, the second-order effect is friction. When banks are explicitly tasked with policing both cash behavior and “suspicious stablecoin transactions,” traders using Thai fiat on-ramps should expect more documentation requests and more monitoring pressure at the banking layer, even if their activity is legitimate.

Where Traders Touch the System: USDT/THB Liquidity and Bitkub’s Market Mix

Thailand still presents a split regime: crypto trading remains legal, while digital asset and stablecoin payments are described as outlawed by the central bank amid regular tightening on crypto businesses.

That distinction puts the spotlight on exchange rails rather than merchant adoption. Bitkub is described as Thailand’s largest exchange, cited at about $26 million in daily volume. Almost 40% of that volume is described as forex, and USDT/THB is cited as the most popular pair, per CoinGecko.

If regulators are auditing “high-volume” USDT activity, USDT/THB becomes the obvious local touchpoint where compliance changes can show up first, through deposit and withdrawal checks, delays, or additional documentation.

What Comes Next for Thailand’s ‘Gray Money’ Crackdown

The immediate unknown is definition. The Bank of Thailand and SEC have not specified what thresholds qualify as “high-volume” stablecoin transactions or which entities are directly in scope for audits beyond broad categories.

Traders should also watch for policy changes at Thai exchanges that touch USDT/THB, including tighter KYC, source-of-funds checks, new limits, or slower processing, especially at venues with meaningful local liquidity.

Enforcement risk is not theoretical in Thailand’s recent history. Banks froze three million accounts in 2025 as part of a crackdown on mule accounts, gray capital, and suspicious activity, and thousands of legitimate individuals and businesses were also affected in what was described as a “scammer crackdown gone wrong.” Any new wave of account freezes, transaction holds, or enforcement actions tied to “suspicious stablecoin transactions” or cash deposits above 5 million baht would be the clearest signal that the current audit posture is turning into hard constraints.

Why This Matters for USDT/THB Friction and On-Ramp Risk

I read this as a market-structure move more than a crypto headline. Thailand is explicitly stitching USDT audits into the same surveillance fabric as cash deposits, FX cash-exchange behavior, and even gold bullion flows. That’s a statement that stablecoins are being treated as a functional substitute for legacy gray-money channels, not a niche asset class.

The threshold that matters is whether “high-volume” gets defined in a way that forces banks and exchanges to over-comply. If that happens, USDT/THB liquidity can degrade through slower fiat rails, more frequent source-of-funds requests, and a higher probability of holds or freezes that catch clean flow in the net. This development matters in practical terms if it measurably increases time-to-settle and documentation burden for THB on-ramps into USDT.

Sources

Cointelegraph