| Registering a marriage abroad | Single-status certificate (or divorce certificate / former spouse's death certificate), birth certificate, household registration, passport copy | District offices under the Department of Provincial Administration | District issues and certifies, then translation, then legalisation at the Department of Consular Affairs, then destination-embassy legalisation where that country requires it | Destinations often impose a short validity window on single-status certificates, so issue it close to the filing date and check the spelling matches the passport |
| Admission or credential recognition | Degree certificate, academic transcript, enrolment or completion letter where applicable | The awarding institution, plus the Ministry of Higher Education, Science, Research and Innovation where the destination requires it | Institution certifies the copy, then translation, then the Department of Consular Affairs, then the credential evaluator or receiving university | Some evaluators only accept documents sent directly by the institution, so read their rules before starting the legalisation chain |
| Overseas employment or professional registration | Qualifications, professional licence, experience letters, criminal record certificate | Educational institutions, professional councils, former employers, and the Criminal Records Division of the Royal Thai Police | Each item passes its own issuer first, then translation, the Department of Consular Affairs, and finally the embassy or destination regulator | Recipients usually impose a short validity on police checks, so request that item last in the bundle |
| Family-reunion immigration filing | Marriage certificate, children's birth certificates, household registration, and a travel-consent letter when a parent is not travelling | District offices, and parents signing before an officer | District certification, translation, Department of Consular Affairs, then the embassy or visa application centre | Immigration authorities cross-check names and dates across every item; minor mismatches should be fixed at source before legalisation |
| Maintaining a pension or benefit entitlement | Life certificate, household registration, passport copy, and a death certificate where the beneficiary has died | District offices, and in some cases the paying country's embassy | District issues the certificate, then translation, the Department of Consular Affairs, and submission to the paying agency within its cycle | Paying agencies usually run an annual cycle; missing it can suspend payment even when the documents are correct |
| Administering an estate abroad | Death certificate, household registrations of the deceased and heirs, court order appointing the estate administrator, power of attorney | District offices and the court that issued the order | The court or district certifies the copy, then translation, the Department of Consular Affairs, then the destination bank or lawyer | Destination banks often demand recently re-issued copies, so legalising too far ahead can force a repeat |
| Corporate transactions and registrations abroad | Company affidavit, shareholder list, memorandum of association, board resolution, power of attorney | Department of Business Development and the authorised directors | Draw the records from the DBD, then translation, the Department of Consular Affairs, then the destination embassy or company registrar | The English company name must match the registered form on every item, or the destination registrar treats it as a different entity |
| Use in foreign proceedings | Judgment or court order, evidentiary documents, certified translation, litigation power of attorney | The court holding the case file and the issuers of the evidence | The court certifies the copy, then translation, the Department of Consular Affairs, then destination counsel or court under that country's procedure | Legalisation only authenticates signature and seal; it does not by itself make a Thai judgment enforceable abroad |