Intensive tracking liabilities with a list of customers who have overdue balances. This type of occupation is quite a high tolerance due to intensive communication between authorities, liabilities with a couple cases (accounts receivable) Some cases, communicate with each other, there may be a conflict?, because a couple of cases (receivable), securities and payment date in each month of the amounts receivable are summarized into installments. Sent to the head of the responsible care of the job.