When the allowance method of accounting for uncollectible accounts is used, then

Bad debt expense is recorded in the same year as the credit sale.

Explanation:

Allowance method is generally refer to one of the ways for reporting the uncollectible or bad debt expense which results from a company selling the goods on credit.

This method is used for the process or procedure of uncollectible accounts receivable that records the estimate of the bad debt expense in the same accounting year to which is belongs as the sale. This method is used for adjust the accounts receivable appears on the balance sheet of the company.