The Bank of Thailand (BOT) has issued Circular No. 8434/2568, titled “Clarification of Procedures Regarding Foreign Currency Transactions with Customers.” Effective December 29, 2025, this directive requires authorized financial institutions to increase the scrutiny of supporting documentation for specific incoming foreign currency transactions.
The primary objective is to manage Thai Baht volatility by ensuring that large capital inflows align with declared purposes for trade and investment. These rules apply specifically to residents in Thailand (both individuals and legal entities) when:
- Banks purchase foreign currency that has been transferred from abroad.
- Banks credit foreign currency received from abroad into a Foreign Currency Deposit (FCD) account.
Mandatory Documentation for Transactions over $200,000
For immediate (spot) transactions amounting to $200,000 USD or more (or the equivalent), banks are required to verify supporting documentation for every individual transaction. This specific threshold applies to transactions that are not related to gold value or physical banknotes.
The “No KYB Shortcut” Rule
Under standard procedures, banks may use simplified “Know Your Business” (KYB) processes for well-known customers with ongoing KYC/CDD records. However, the BOT has mandated that KYB cannot be relied upon as a shortcut for transactions of $200,000 USD or more if the purpose falls under the following four categories:
- Thai Real Estate Investment: Any funds designated for property investment in Thailand.
- Digital Assets: Payments related to the acquisition of digital assets.
- Other Capital Transfers: Capital flows not involving intercompany investments, branch funding, or standard securities and loans.
- Miscellaneous Purposes: Any transfer not categorized as payment for goods, services, income, or standard donations.
In these cases, physical or digital supporting documents must be collected for every single transaction.
Updated Requirements for Forward Transactions
The directive also addresses forward transactions. While these generally continue under existing guidelines (Circular 31 March 2547), the same “no KYB shortcut” carve-out applies. For the four categories mentioned above—including property and digital assets—banks must request full documentation regardless of the customer’s standing.
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Property and Digital Asset Documentation
Real estate and digital assets are high-priority sectors under this directive:
- Property: For incoming payments of $200,000 USD or more intended for Thai property investment, banks must perform a full document verification on the trade date or no later than the settlement date.
- Digital Assets: Banks are required to call for additional evidence showing the source of the digital assets or the source of the funds used to purchase them.
Specific Rules for Gold and Physical Banknotes
The BOT has clarified the verification timelines for specific high-volume assets:
- Gold Transactions: Banks must request documents proving the sale of gold abroad for every individual transaction, regardless of the amount. This must be provided on the trade date (or the next business day if outside hours). Additionally, billing documents and the gold customs declaration must be submitted within two business days from the settlement date.
- Physical Banknotes: When dealing with physical foreign banknotes in amounts of $15,000 USD or more, banks must request evidence proving that the notes were legally brought into Thailand.
Compliance Timeline
These measures take effect on December 29, 2025. To avoid delays, investors should ensure that all supporting evidence—such as sale and purchase agreements or invoices—is ready for submission to their bank by the trade date or, at the latest, the settlement date.
