First of all, We would like to thank you for your kind cooperate .
Regarding I'm got received information from AIT’s warehouse, sometime found the invoice no declared Purchase Order number. This is just a small problem, but it is affect to incoming process in AIT.
So the next time , We would like to request you that declared the Purchase Order number (PO. No) in each invoice before delivered .(See example as attached) , and please starting from 2015’ Dec.