Thai banks begin enhanced due-diligence checks on certain branch cash-related transactions of THB5 million or more in one day from 1 November 2026. The Bank of Thailand says the process can include identity verification, the source of funds, the purpose of the transaction and supporting documents according to risk.
The change does not create a general ban on large legitimate transactions, and it does not apply in the same way to normal electronic channels. Its practical effect is that a customer arriving at a branch with a high-value cash plan should expect more questions and should prepare the paper trail before the appointment.
Quick Guide
| Effective date | 1 November 2026. |
|---|---|
| Threshold | THB5 million or more in branch cash-related transactions in one day. |
| Possible checks | Identity, source of funds, purpose and risk-based supporting documents. |
| Electronic channels | Normal electronic transactions are not the focus of this branch cash measure. |
| Preparation | Contact the bank before the visit and bring documents that explain the transaction. |
Understand the Threshold
The measure looks at cash-related branch transactions reaching THB5 million or more in one day. Splitting a plan without a genuine reason does not remove a bank’s responsibility to understand activity, and attempts to avoid review can create more concern. Explain the whole transaction honestly.
Ask the bank whether multiple operations on the same day are considered together. The exact process can depend on the institution, customer relationship and risk assessment. A branch appointment is sensible when property, business or investment timing depends on completion.
Know the Scope
The Bank of Thailand examples include cash deposits, banknote exchange, cash used for cashier’s cheques or drafts where the source is not clear, cashing certain instruments, foreign-exchange activity and cash payments for insurance, investment products or derivatives.
A normal personal or company cheque deposit is not automatically the same as arriving with banknotes. Likewise, an electronic transfer is not a cash branch transaction merely because the value is large. Describe the exact method to the bank rather than assuming the rule from the amount alone.
Prepare the Evidence
Useful records can include contracts, sale agreements, invoices, tax documents, withdrawal records, probate papers or corporate approvals, depending on the source and purpose. The bank decides what is adequate for the particular risk. Bring originals or certified copies when requested.
Names, dates and amounts should align across documents. If money moved through several accounts or currencies, prepare a simple chronology with the supporting statements. A clear explanation reduces back-and-forth, but it does not guarantee immediate completion when additional review is required.
Plan for Timing
Do not place a property completion, auction, business settlement or travel deadline against a branch visit with no margin. Contact the bank early, ask which branch can handle the transaction and confirm cut-off times. Some instruments or currencies require advance preparation.
Enhanced checks can take longer when documents are incomplete or the transaction differs from normal account activity. Keep the counterparty informed about realistic timing without sharing sensitive banking information. Written extensions or alternative settlement methods may need professional advice.
Protect Against Scams
A request for secrecy, urgent cash conversion or payment to an unfamiliar beneficiary is a warning sign. Independently verify instructions through a known contact, especially for property, investment, legal or family emergencies. Bank checks are a safeguard, not proof that the underlying deal is genuine.
Never hand credentials, one-time codes or remote access to someone who offers to help pass a review. Use the bank’s recognised contact channels and take legal, tax or accounting advice where the transaction requires it. Keep copies of the submitted records in a secure location.
Make It Work
The rule is best treated as an advance-planning requirement. A legitimate customer with a clear source, purpose and coherent documents should prepare early rather than arrive at the branch expecting an instant high-value cash service.
Bank procedures can differ within the regulatory framework. Confirm the plan with the institution that will execute the transaction and obtain professional advice when ownership, tax, corporate authority or deadlines are material.
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FAQ
When do the checks begin?
The Bank of Thailand lists 1 November 2026 as the effective date.
Do electronic transfers trigger the same branch cash rule?
The measure focuses on cash-related branch transactions; ordinary electronic channels are not treated the same way.
What documents will the bank ask for?
Requirements depend on the transaction and risk, but can cover identity, source, purpose and supporting contracts or records.
Practical Information
Contact the bank before any THB5 million branch cash-related transaction. Describe the method, amount and purpose, and ask for the exact documents and timing in writing.