Currently, our accounting department is checking all the outstanding DN/CN and they found that some items still appear as incomplete on the system.
Therefore, we would like to check whether the payment has already been made or not. Since these DN/CN items were since Y2013, I am not sure about actual cause either. Accounting also wanted to know the reason as well. My best guess would be that maybe these DN/CN occurred during the transition of the deparment re-organization and the new buyer during that time might not be aware of these DN/CN items.