The Charoenchai Group ordered laser printer from your company for the amount of 670,000 baht and you sent an invoice (number 5770034 dated June 24,2015) to your customer. According to the payment terms Net 60 agreed by both parties, the payment was due on August 22,2015. However, the customer hasn’t settled the payment and you have sent 4 reminders to the Chief Accountant of The Charoenchai Group informing that their account will be given to a collection agency if they do not make the payment within two weeks.