Thailand

In Thailand, most lending happens far from a bank counter. Parents help a child with a condo deposit, coworkers cover each other a few days before payday, and a shop owner borrows from a cousin to restock before a festival. The money itself moves in seconds by PromptPay or bank transfer — but the agreement behind it is often nothing more than a conversation, and that is usually where trouble begins.

Putting the loan in writing matters more than many people expect. Thai law generally requires written evidence to enforce a loan above a modest amount, so a lender with only a verbal promise can find it very hard to recover the money. Thai law also limits the interest a private lender may charge; agreeing to an unlawfully high rate can make the interest part of the deal unenforceable. A simple one-page agreement signed by the borrower — names, amount, date, repayment plan — changes the situation completely.

Written records help with more than loans. Rental deposits, down payments on secondhand cars and motorcycles, and payments for freelance work all lead to fewer disputes when both sides keep a signed document and the transfer slips that go with it. Many Thais also keep the LINE conversation where the deal was discussed — informal, but genuinely useful if memories later differ.

Common signing methods

• Wet-ink signatures on two printed copies, one kept by each side — still the most common approach for family and personal loans.
• Signing a PDF on a phone or tablet, then sending the signed file back through LINE or email so both people hold the same version.
• Confirming the key terms in a LINE chat. This is not a signature, but a chat record that clearly states the amount, the date, and the repayment promise is widely kept as supporting evidence.
• For business documents, an authorized signature together with the company stamp is the usual convention in Thailand.
• A thumbprint in place of a signature is still seen, mainly with older relatives. By long-standing Thai practice a thumbprint should be certified by witnesses, so treat it with extra care rather than as a shortcut.

Witness guidance

• Everyday loan agreements in Thailand do not generally need witnesses to be binding between the two parties. Even so, having one or two adults witness the signing and sign the document themselves is common practice, and it makes the agreement much harder to dispute later.
• Choose witnesses who gain nothing from the deal — a neutral colleague or neighbor is better than the borrower's spouse. Record each witness's full name and a way to contact them, because a witness you cannot find years later is not much help.
• If either party signs with a thumbprint instead of a signature, witness certification becomes especially important under Thai practice, so do not skip it in that situation.

Electronic signatures

• Thailand has an electronic transactions law that generally recognizes electronic signatures and electronic documents, so an agreement signed on a screen is not automatically worthless. FinSafe cannot promise that any particular e-signature will hold up in a specific dispute — no honest service can.
• What matters in practice is reliability: being able to show who signed, that they meant to agree, and that the file was not changed afterwards. Keep the original signed PDF, note the date and time of signing, and save the messages exchanged around it.
• For large or complicated loans, printing the document and signing in wet ink remains the simplest and least arguable path in Thailand.

Example

• PromptPay and bank transfers create automatic records. Save the transfer slip for every disbursement and every repayment — together they tell the whole story of the loan.
• Thailand commonly uses Buddhist Era years (2569 BE is 2026 CE). Write dates in full and make clear which calendar the document uses, especially in bilingual agreements.
• Write money amounts in both figures and words — for example 50,000 baht (fifty thousand baht) — so a single mistyped digit cannot change the meaning.
• When one party is not a Thai speaker, bilingual Thai–English agreements are common. State plainly which language version controls if the two ever differ.