Dear Whom may concern,
We are writing concerning a payment of THB73,397.50 for invoice number TD/2016-052, TD/2016-061 which is now overdue. A copy of the invoice is attached.
According to our records, the sum of THB73,397.50 is still outstanding on your account
Please send a bank transfer to settle the account, or an explanation of why the balance is still outstanding.
We could appreciate your cooperation in resolving this matter as soon as possible.