In order to make international payments to Tonga you have to know the bank´s SWIFT / BIC code.
The SWIFT code consists of 8 to 11 characters (letters and digits) and for Tonga the SWIFT code has the following format:
|ANZBTONN||AUSTRALIA AND NEW ZEALAND BANKING||NUKUALOFA|
|BTONTONU||BANK OF TONGA||NUKUALOFA|
|MBFMTONU||MBF BANK LIMITED||NUKUALOFA|
|NRBTTONU||NATIONAL RESERVE BANK OF TONGA||NUKUALOFA|