Following recent mandatory governmental requirement for payments being received in Thailand, any SWIFT payment to Thailand will require the purpose of the payment to be applied within the payment instruction. For example if the payment is a salary payment you are required to enter this information within the Reference/Further Payment Details section. Supporting documents (i.e. invoice, salary slip) are required for payments over 5,000,000.00 THB, showing the purpose of the fund transfer as per bank of Thailand's regulation.
It is important to note that if the purpose of the payment and support documents (if required) is not included then the payment will be returned by the Overseas Bank.