There are two ways to record a bad debt, which are:
1Direct write-off method. If you only reduce accounts receivable when there is a specific, recognizable bad debt, then debit the Bad Debt expense for the amount of the write off, and credit the accounts receivable asset account for the same amount.
2Allowance method. If you charge an estimated amount of accounts receivable to bad debt expense in the same period when you record related revenue, then debit the Bad Debt expense for the amount of the estimated write-off, and credit the Allowance for Doubtful Accounts contra account for the same amount.