The Thai baht uses the ISO code THB and the symbol ฿. Read the currency code as well as the amount on an international account: a localised page or a Thai telephone number does not make the balance a baht balance. Check whether both deposits and withdrawals are quoted in THB. [1]
Thai baht
Currency settings
If money leaves a baht account and arrives in a different account currency, compare the amount sent with the amount credited after conversion. A payment fee and a currency-conversion cost are separate items. Keep the original receipt so a later withdrawal can be compared using the same currency basis, rather than two bare numbers.