K. Rattana, I found one transaction in open item the payment will be paid to vendor on 12.11.15. So pls kindly get from the your supervisor to reverse this transaction in order to prevent like this case.
Pook, Upon the approval, please reversed SAP doc. 2400000030/0279 and also advice how we can deduct WHT 1% for SAP doc. 2400000028/0279 as the payment was paid to vendor by full amount on 21.10.2015.