At the end of the fiscal year, the adequacy of the allowance for doubtful debts must be reassessed on the basis of reports of age of receivables, conditions for granting long-term sale and checking customer accounts. According to the rates stipulated in the policy of deferred sale and collection, and based on the results of studying the provision for doubtful debts at the end of the fiscal year, it is possible to increase or decrease the allowance for doubtful debts.