A foreign buyer should be able to answer a simple question before reserving a Bangkok condominium: who has the legal authority to sell this exact unit? A familiar building, polished agent presentation or convincing video call does not replace identity and authority checks.
The objective is to make the person, ownership record, contract and payment trail consistent. This guide is a practical briefing rather than case-specific legal advice. Buyers should appoint an independent qualified Thai lawyer to examine the documents and current Land Office requirements.
Identify the seller named in the ownership record
Ask the lawyer to inspect the relevant ownership evidence and compare the registered owner’s details with the seller’s identification. Names may appear differently across languages or documents, so unexplained spelling, sequence or transliteration differences should be resolved before signing.
Do not rely on a photograph of one page or a name copied into a sales brochure. The legal review should consider the complete current record, the unit particulars and any registered matters that affect transfer. A physical inspection should also confirm that the unit being shown is the unit described in the transaction file.
Check identification as a current document
The seller’s passport or Thai identification should be current and legible. Compare the photograph, identifying details and signature with the person participating in the transaction. Where certified copies are used, the lawyer should advise what certification and witnessing are appropriate for the purpose.
A copy sent through a messaging app is information, not a complete safeguard. Buyers should use a controlled process for collecting and storing personal data, sharing it only with professionals who need it. Sensitive documents should not circulate casually among unverified contacts.
Establish who is signing
Sometimes the registered owner signs personally. In other cases, an attorney, corporate representative, executor, guardian or other authorised person may act. Each arrangement requires evidence that the signatory has valid authority for the specific transaction.
If a power of attorney is involved, have the lawyer review its scope, form, execution, dates and intended Land Office use. Confirm that it covers the necessary acts and that the seller is still able and willing to grant the authority. Never assume a person described as a relative, assistant or local representative can bind the owner.
Corporate sellers need an authority chain
Where the seller is a company, the buyer needs more than an individual’s business card. The legal team should examine the company’s current registration information, authorised directors, signing conditions and any internal approvals relevant to the sale.
Check that the name on the ownership record matches the legal entity in the contract and payment instructions. A trading name, project brand or related company is not automatically interchangeable with the registered owner.
Life events can change the file
Marriage, divorce, death, incapacity or insolvency can affect who must consent or who is able to transfer. The implications depend on the facts and applicable law. Buyers should tell their lawyer about anything in the documents or communications that suggests the ownership position has changed.
Do not try to resolve an estate or family-law question through informal assurances. Pause the timetable while the correct evidence and authority are established. The cost of delay is usually smaller than the risk of paying a party who cannot complete the sale.
Cross-check with building records
The condominium juristic office is not a substitute for legal due diligence, but its records can provide useful practical checks. With appropriate authorisation, ask about the recorded owner contact, outstanding common expenses, access arrangements and the process for documents needed at transfer.
Unexpected answers should be investigated. A different owner name, an unknown occupant or resistance to ordinary checks does not prove wrongdoing, but it is a reason to slow down and obtain clarity.
Control where money goes
Reservation money, deposits and completion funds should follow written instructions that match the reviewed transaction structure. Verify account changes through an independent known channel. Email compromise and impersonation risks make last-minute payment changes especially important to check.
Do not send funds to an unrelated personal account simply because someone says it is convenient. If an agent, lawyer or stakeholder is to hold money, understand the written terms, release conditions, refund process and identity of the regulated or responsible party.
Make remote checks stronger
Remote transactions need more structure, not less. Arrange a live identity check through trusted professionals, compare original documents where required and confirm how signatures will be witnessed or authenticated. Keep a clear record of who sent each document and when.
Use independently obtained contact details for the law firm, agency and other professionals. A phone number contained only in the same suspicious email does not provide an independent check. Buyers should also agree a verbal payment-confirmation step before any material transfer.
Keep the contract consistent
The seller name, unit details, price, payment account and signing capacity should remain consistent across the reservation, sale agreement, receipts and transfer preparation. If the commercial structure changes, the documents should be updated and reviewed rather than patched with informal messages.
Allow enough time for translation and questions. A buyer who does not read Thai should obtain a reliable explanation of the documents they are asked to sign. Pressure to sign immediately is a poor reason to bypass an identity or authority concern.
Seller identity checklist
- Match the seller to the current ownership evidence.
- Resolve name and transliteration differences.
- Check current identification and signing capacity.
- Review any power of attorney for the specific purpose.
- Verify corporate authority where a company sells.
- Ask whether life events affect consent or transfer.
- Cross-check relevant building information.
- Verify payment instructions independently.
- Keep one consistent, lawyer-reviewed transaction file.
Seller identity checks are a core part of buying safely, especially from overseas. Explore IBP’s foreign buyer guides and legal and due-diligence briefings, or contact IBP Real Estate to assemble a properly supported Bangkok shortlist.