All participants attending the conference who do not hold a Thai passport require a visa (you will need to ask your local Thai Consulate the right visa application form). Please consult your nearest Royal Thai Consulate for further information.
More information: Ministry of Foreign Affairs website
Please note, the visa form may require the following information, including the APNIC 48 invitation letter, which will be sent to you when you register:
Workshop and conference venue name and address
Le Meridien Chiang Mai
APNIC 48 conference local host