Note that since August 29, 2014, it is possible to extend your visa waiver or tourist visa once and get additional 30 days upon request to the Immigration Office ).
The passport (original and photocopy). The passport must be valid for at least six months after the date of departure.
The completed form
A color photo ID
Photocopy of residence permit (for travel document holders)
A copy of the airline ticket booking with details (entry ticket and exit of Thai territory within less than 90 days)
A copy of financial proof: the statement of recent bank statement with an amount of 1,000 euros minimum (the copy of bank statement printed on the internet is not admissible or this copy must be signed and stamped by the bank) or a bank statement
The visa fee