You are using an outdated browser and your browsing experience will not be optimal. Please update to the latest version of Microsoft Edge, Google Chrome or Mozilla Firefox. Install Microsoft Edge

May 30, 2024

Bank Guarantee Disputes in Thai Construction and Procurement Agreements

A bank guarantee or bond is a powerful tool that provides contractual parties with security and assurance. Bank guarantees are commitments made by a bank (as a guarantor) on behalf of a customer (as an obligor) to a beneficiary to ensure that certain contractual obligations will be fulfilled. If the customer fails to comply with these obligations, the bank can compensate the beneficiary up to the amount specified in the bank guarantee.

Bank guarantees are widely used in Thailand as a form of security and are common in construction agreements and government procurement contracts, among others. If the beneficiary (e.g., a project owner) concludes that the counterparty in the agreement (e.g., a contractor) has breached the underlying contract in some way, the beneficiary will demand payment from the bank pursuant to the guarantee.

Collecting on a Guarantee and Preventing Payment

In the context of construction and procurement agreements, there are two types of bank guarantees—conditional and unconditional. A conditional bank guarantee means that the project owner must satisfy certain agreed-upon conditions (e.g., provision of proof of the breach, proof of damages, or even consent from the contractor) to demand payment. An unconditional bank guarantee means that the bank must compensate the project owner for the demanded amount (up to the limit specified in the bank guarantee) without any conditions.

When a project owner concludes that a contractor has breached the underlying contract (often for nonperformance or failure to comply with a representation or warranty), the project owner will demand payment from the bank holding the guarantee. Upon receiving such a demand, Thai banks will usually inform the contractor and ask if it has any objections.

Even if the bank guarantee is unconditional, in practice, a bank may be reluctant to make payment if the contractor, as the bank’s customer, strongly objects. This means that if the contractor disagrees with any insinuation by the project owner that a breach has occurred, and there is a risk that the project owner will demand payment under a bank guarantee, the contractor should clearly voice its objection.

To make an effective objection, the contractor should be aware of the various conditions that are attached to the guarantee. Common conditions in Thailand include requirements that the project owner make a demand through a specific channel or method, or within a specific time-period (e.g., 15 days from the date that the project owner became aware of the breach entitling the project owner to make a demand). The Thai Supreme Court has ruled that this is an essential condition to make a demand, and failing to do so would cost the project owner the entire payment under the bank guarantee.

Furthermore, the breach or other event entitling the project owner to make a demand must occur before the expiry date specified on the bank guarantee. In other words, the bank guarantee must be valid when the breach event occurs. If the guarantee is no longer valid at the date of the breach, the bank should deny any payment request. As such, parties should know the expiry date of the guarantee and plan accordingly.

Lastly, the contractor may carefully and selectively provide an argument, together with necessary and sufficient supporting documents, to claim that the project owner’s payment demand has no merit. A common example is to show that the contractor is actually not in breach and that any payment demand by the project owner is misguided and premature. An effective argument by the contractor can help persuade the bank to hold off on making any payment under the guarantee.

If a contractor’s objection to a bank regarding payment is not effective, then the contractor will usually have to resort to court action. An injunction can potentially stop the project owner from demanding payment from the bank or prevent the bank from making payment to the project owner. A court order is required, and in certain limited circumstances, an injunction may be granted on an emergency basis. This is applicable to both litigation and arbitration proceedings. However, Thai courts are generally reluctant to grant emergency injunctions, and the evidentiary standards are high.

Conclusion

Bank guarantees are often an integral part of Thai legal transactions, such as construction and procurement agreements. When disputes arise, and ideally before they do, the contractor and project owner should be fully aware of any conditions attached to guarantees. Swift action is usually required when a party wants to call a bond. It is generally in the best interest of both contractors and project owners to know their respective legal positions and have a ready-made plan to handle any dispute that may arise involving a bank guarantee.

RELATED INSIGHTS​ 

August 3, 2026
On July 23, 2026, the Bank of Thailand (BOT) released for public comment its draft Notification on Digital Channel Security, which would significantly expand the scope and stringency of Thailand’s existing mobile banking security framework. If finalized in its current form, the draft notification would extend mandatory security requirements to credit card providers and credit providers, cover internet banking in addition to mobile applications, phase out SMS one-time passwords (OTPs) for transaction authentication, and introduce biometric verification requirements for high-value transactions. The public comment period is open through August 24, 2026. Background The BOT’s existing Mobile Banking Security Notification, issued in 2024, sets minimum security standards for financial institutions, specialized financial institutions (SFIs), and e-money providers, significantly reducing “money-draining app” fraud. However, fraudsters have since shifted to nonbank providers and internet banking channels, prompting the BOT to propose broader security requirements. Expanded Scope of Regulated Entities and Channels The existing Mobile Banking Security Notification covers only financial institutions, SFIs, and e-money providers offering mobile banking services. The draft expands coverage in two key areas: entities and channels. On the entity side, it adds credit card providers and credit providers that offer fund transfers to third parties at other financial service providers or that provide cash withdrawal services to individual retail customers. On the channel side, it broadens coverage to include internet banking in addition to mobile banking. Strengthened Customer Authentication The draft introduces enhanced authentication requirements in three areas: Service enrollment and device changes. Providers must implement rigorous identity verification, notify customers of enrollment results through out-of-band communication channels, and adopt risk-mitigation measures such as cooling-off periods and temporary transaction limits. Transaction-level authentication. Providers must use two-factor authentication for fund transfers, cardless ATM withdrawals, and transaction limit increases. Secure authentication factors. Key requirements include the following: “What-you-know” factors must
July 27, 2026
A new decree on penalties for violations related to the crypto asset market creates compliance risks for offshore crypto asset exchanges in Vietnam that do not hold, and practically cannot obtain, a Vietnamese license, and for Vietnamese users who continue to transact on those platforms. Decree No. 284/2026/ND-CP (Decree 284), issued by the government of Vietnam on July 16, 2026, formally establishes an administrative penalty framework for violations related to crypto assets and the crypto asset market. The decree takes effect on September 1, 2026, and will remain in force for the duration of the five-year pilot program under Resolution No. 05/2025/NQ-CP, which is scheduled to end in September 2030. Direct Penalties on Vietnamese Users The most immediate commercial risk to offshore platforms is that their Vietnamese users now face direct personal liability for using their exchanges. Vietnamese users who trade crypto assets outside of a Ministry of Finance-licensed service provider face fines of up to VND 50 million (approximately USD 1,900). Vietnamese users trading in crypto assets that are offered or issued to foreign users face higher penalties of up to VND 100 million (approximately USD 3,800). It is expected that Vietnamese users will be more willing to migrate away from offshore platforms now that there is a risk of real enforcement against them. Penalties on Unlicensed Service Providers Violations of providing crypto asset services or advertising crypto-related services without a license face fines of up to VND 200 million (approximately USD 7,700). Operating a crypto asset trading market without proper authorization falls within the same highest penalty bands. Organizations that violate issuance, provision, or disclosure rules may face fines of up to VND 200 million. Although the maximum administrative fine per violation is capped at VND 200 million for organizations and VND 100 million for individuals, these
July 17, 2026
On July 11, 2026, media reports conveyed key messages from Bank of Thailand (BOT) Governor Vitai Ratanakorn’s announcement of a sweeping regulatory crackdown on grey capital activities. The measures target high-value cash transactions, gold trading, and stablecoin flows, with new requirements set to take effect in the fourth quarter of 2026. The initiative aims to prevent financial institutions from facilitating shadow economy activity, money laundering—particularly through stablecoins—and capital flight, through enhanced compliance obligations on commercial banks across multiple transaction channels. Expanded Cash Controls Close the Deposit–Withdrawal Circuit New fourth-quarter guidelines will require individuals depositing THB 5 million or more in cash to formally verify the source of their funds. This builds on restrictions introduced in April 2026, which required anyone withdrawing 5 million baht or more in cash to provide their bank with verified commercial justification for why electronic transfers or checks could not be used. That initial measure caused high-value physical cash withdrawals to drop by 35 percent nationwide. The upcoming deposit-side requirement closes the circuit on large cash movements. The BOT is also assessing tracking mechanisms for high-value banknote swaps, specifically targeting individuals seeking to exchange large volumes of THB 1,000 notes into smaller THB 100 or THB 500 denominations without clear business justification. Governor Vitai emphasized that these measures require continuous deployment of multiple parallel strategies rather than short-term fixes. Tightened Bullion Reporting Frameworks Restrict Money Laundering Channels The BOT has also tightened reporting frameworks for gold trading to close money laundering loopholes and shield the Thai baht from speculative bullion volatility. Regulators identified a recurring pattern in which buyers purchased large quantities of gold through digital applications in the morning and then made same-day physical withdrawals from retail gold shops in the afternoon. Gold shops are reminded of their duties to flag and report cash
June 29, 2026
Thailand’s cabinet has approved the draft Act on Liability for Defective Goods, commonly called Thailand’s “Lemon Law.” The Draft Act is currently pending consideration by Parliament. The draft law aims to strengthen buyers’ position in pursuing cases against sellers. While the Civil and Commercial Code offers provisions governing liability for defective goods, it is difficult in practice for buyers to successfully make a claim against sellers, particularly where defects are latent and not discoverable at the time of sale or delivery. By introducing product-specific rules and clearer remedies, the new law is intended to modernize Thailand’s consumer protection framework and align it more closely with international standards, and to help relieve the buyer’s burden of proof against the seller in product liability cases. If enacted, the draft act will take effect 180 days after publication in the Government Gazette, giving businesses a transition period to assess their compliance obligations. This article provides an overview of the key provisions of the draft act and highlights some practical considerations for businesses operating in Thailand. Scope and Key Definitions The draft act applies to sellers—defined as persons who sell goods in the ordinary course of business—and protects buyers, a term defined broadly to include not just the original purchaser but also transferees and successors in title. This expands the class of people who can bring claims. The law does not apply to used goods, live animals, or goods exempted by future ministerial regulation. It also leaves intact any separate warranties, promises, advertisements, or other guarantees a seller has given; those remain enforceable alongside the new statutory rights. General Liability for Defective Goods Sellers are liable for defects that exist at the time of delivery, regardless of whether the seller knew about them. Liability arises where a defect reduces: The benefit intended under