Answer:
Debit Accounts Receivable, credit Allowance for Doubtful Accounts.
Explanation:
To record the collection of accounts receivable previously written off when using the allowance method, the first step is to debit Accounts Receivable, and then credit Allowance for Doubtful Accounts. This purpose of this to reverse the already written off amount.
The next step after that is to complete the entries by debiting Cash, and crediting the Accounts Receivable to record the cash collection in respect of previously written off accounts receivable.