Because ,your invoice showed currency is USD. We received it in USD, So that, We had Account Payable you are USD and Avenue are not acceptance if we are pay in Thai baht.
Thus, You will have loss from exchange rate amount 631.0226 USD. and previous, We ever told you can issue the Debit Note to us. We had consulted them. They are not acceptant it.
In the next time. We will revise the P/O to you in USD/LB as same as Purchase order number. We will have not this problem again.