The reservation stage should narrow the deal, not blur it. The document needs to identify the unit, price, seller, reservation fee, contract-signing deadline and the conditions governing that payment. If the buyer wires money first and asks about refund rights later, due diligence starts with avoidable pressure. For condominium reservations covered by Thailand's consumer rules, additional statutory protections now apply, but the buyer should still read the actual document presented for signature.
Next comes independent due diligence. On a completed resale, that means verifying the specific unit, registered owner, encumbrances, condominium records and whether the agreed ownership route is actually available. An off-plan deal requires a different file: the developer entity, project documentation, authority to sell, payment structure and the legal position before a completed unit can be transferred. A sales agent may coordinate all of this, but coordination is not the same as independent legal review.
The sale and purchase agreement is where commercial enthusiasm has to become enforceable detail. The payment schedule should be unambiguous; completion and handover need dates or objectively defined triggers; delay and termination clauses need to work in both directions; specifications that matter to the buyer should be attached rather than left in a presentation. If there are Thai and English versions, ask the lawyer which version governs if they diverge.
Payments then become a control process. Verify the beneficiary before each material transfer and do not accept a last-minute account change as an administrative detail. If the contract names one entity but funds are requested to another, the relationship should be documented and understood before payment. Keep a complete record so that every baht or foreign-currency remittance can be tied back to a contractual obligation.
Finally, separate physical handover from legal transfer. The inspection establishes what condition the buyer is receiving; the Land Office registration establishes the ownership. A remote transaction is well run when both events have a named responsible person, a checklist and written evidence, rather than a single representative being told simply to 'handle everything'.