The procedure for making a document legal in Thailand is to have the document signed by a Notary then obtain an Apostille from the Foreign & Commonwealth Office (FCO) before submitting it to the Royal Thai Consulate.

The FCO has two offices, one at Milton Keynes (postal centre), and one in London which offers a Premium Service for business users.  For FCO charges click here.:

Royal Thai Embassy Contact Details:

Consular Section

Royal Thai Embassy

29 Queen’s Gate (Basement)

LONDON SW7 5JB

Tel:   020 7589 2944