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The Bank of Thailand and the Securities and Exchange Commission (SEC) are conducting joint audits of high-volume transactions of Tether’s USDt (USDT) on licensed domestic platforms, targeting activity that regulators say may conceal beneficial owners or represent cross-border fund movement outside standard remittance channels.
The new oversight extends existing controls on large cash withdrawals to the deposit side of the ledger, with rules requiring source-of-funds documentation for cash deposits of 5 million Thai baht ($150,000) or more expected to take effect in the fourth quarter of 2026.
Thailand’s Central Bank and SEC Probe High-Value USDT Transactions
According to The Nation, the Bank of Thailand will require individuals depositing THB 5 million ($150,000) or more in cash to verify the source of funds. It is also working with Thailand’s SEC to review large… pic.twitter.com/ysl2dEv4jk
— Wu Blockchain (@WuBlockchain) July 12, 2026
The deposit rule mirrors controls already in place for withdrawals since April 2026, when the Bank of Thailand began requiring customers making cash withdrawals above 5 million baht to provide a verified business reason and explain why an electronic transfer could not be used instead.
The withdrawal rules produced a 35% drop in large cash transaction volumes, a result the central bank cited as evidence that the model works and as the direct reason for closing the corresponding gap on the deposit side.
Thailand’s USDT scrutiny did not begin this week. Bank of Thailand Governor Vitai Ratanakorn flagged stablecoin monitoring concerns in January 2026, stating that roughly 40% of USDT sellers on Thai-licensed platforms were foreign nationals and arguing that foreign participants should not be operating in Thailand’s domestic stablecoin market.
🛑 THAILAND PUTS USDT UNDER SCRUTINY
Bank of Thailand Official Statement
• $USDT accounts for 52% of all digital asset trading in Thailand.
• 40% of $USDT sellers are non-resident foreigners.
Concern:
Selling $USDT for Thai baht could put upward pressure on the baht and… pic.twitter.com/du2EtBmyeZ
— Crypto Aman (@cryptoamanclub) July 12, 2026
The governor framed the USDT oversight alongside parallel monitoring of cash exchange booths, gold trading, and electronic wallet flows, treating stablecoins as a structurally equivalent gray-money channel rather than a distinct category requiring entirely different oversight logic.
USDT’s characteristics that make it attractive for legitimate cross-border payments are the same ones that draw regulatory concern. The Tron blockchain alone holds more than $90 billion in USDT and processed $4.2 trillion in USDT transfer volume year-to-date in 2026, driven by low fees and predictable transaction costs. Thai daily domestic crypto trading volume averages 2.8 billion baht, a fraction of the 10 billion-15 billion baht daily foreign exchange market, but the concentration of USDT in that smaller volume is what prompted regulatory action.
In 2024, the iCon Group investigation, which involved a 247-million-USDT trail traced by Thailand’s Anti-Money Laundering Office, established the enforcement precedent. TRM Labs published a 2026 crypto crime report explicitly identifying USDT’s ease of remittance, privacy features, and low fees as factors that make it popular among criminal networks in Southeast Asia, particularly for online gambling operations and cross-border value transfer. Thai authorities used that report alongside domestic enforcement findings to justify extending the AML framework’s reach into stablecoin activity without waiting for new legislation.
Thailand’s SEC approved USDT and USDC as permitted cryptocurrencies for domestic digital asset transactions in March 2025, a regulatory recognition that gave the stablecoins legitimate status on licensed platforms while simultaneously placing them inside the SEC’s oversight perimeter. The current USDT audit operates within that existing framework rather than requiring new primary legislation.
The USDT measures sit inside a wider Thai effort targeting what Governor Ratanakorn describes as structural gray capital. The Bank of Thailand is separately considering curbs on high-value banknote exchanges and reviewing potential restrictions on large gold trading transactions, two channels that auditors have identified as parallel routes for the same money flows that USDT audits are targeting in digital markets.
The Jan. 9 directive from Prime Minister Anutin Charnvirakul formally mandated coordinated action between the Bank of Thailand, the Revenue Department, and the Anti-Money Laundering Office to identify and stop suspicious financial flows before they affect macroeconomic stability. The USDT audit and the deposit due diligence requirement are the two most visible outputs of that January directive so far.
Thailand’s domestic crypto market has operated under a licensing framework since 2018. The SEC currently supervises seven licensed digital asset exchanges. Each is already required under the Anti-Money Laundering Act to classify digital asset business operators as financial institutions for reporting purposes, conduct customer due diligence, file suspicious transaction reports, and screen against Anti-Money Laundering Office watchlists.
The USDT audit extends that existing architecture rather than creating parallel infrastructure, making implementation faster but also placing the compliance burden directly on exchanges that are already operating inside the SEC perimeter.
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