1. Discuss with Khun Jompol, to understand the Company's policy for set up allowance for doubtful accounts and review whether the Company's policy is reasonable.
2. Compare the current period's allowance for doubtful accounts with previous period's allowance for doubtful accounts and obtain reasons for fluctuation. Determine accounts receivable collection period. Then, compare it with the Company's normal credit term and that of prior year; and obtain explanation of material variations.
3. Determine that bad debts written off has been approved by a responsible official independent of the cash receipts, sales and receivables functions.
4. Assess the reasonableness of allowance for doubtful accounts by recalculate allowance for doubtful accounts based on the Company's policy.