What happens when you first instruct us
The first conversation establishes three things: what outcome you actually need, which of the facts can be supported by documents that already exist, and whether anything in the matter carries a deadline. Those three answers usually reshape the instruction. A client who arrives asking to sue a supplier may in fact need the goods released from customs this week, and a client asking for a contract review may have already accepted the terms by conduct.
We then set out the scope in writing: what we will do, what we will not do, who at the firm handles it, what we need from you, and what stages the matter passes through. Scope discipline protects both sides. Open-ended instructions are how legal matters drift and how clients receive work they did not want.
Identification and authority come next. For an individual, a passport and a signed power of attorney are normally enough. For a company, we need the corporate certificate, the shareholder list, the articles as registered, and evidence that whoever signs the mandate is authorised to bind the company. Where signatures were given abroad, notarisation and consular or apostille handling may be required before a Thai authority will accept them, and that lead time is planned rather than discovered.