Which of the following is not credited to debtors control account?

The Debtors (Sales Ledger) Control Account is credited with everything that genuinely reduces the total amount customers owe, based on entries actually posted from the books of original entry during the period. Cash and cheques received from debtors, discounts allowed to them, returns inward, bad debts written off, and bills receivable accepted from debtors in settlement of their accounts are all credit entries, because each one represents debt that has actually been cleared, written off, or converted into another form.

A provision for bad debts is fundamentally different from these items. It is an estimate set aside for debts that might become uncollectible in the future; it is not a transaction that has actually happened to reduce any specific customer's outstanding balance. Because the control account only reflects real transactions that affect the total of individual debtor balances in the sales ledger, a general provision, which is an accounting estimate rather than a posted transaction against any particular debtor, is never entered in it at all. It is instead recorded only in the general (nominal) ledger and shown as a deduction from debtors in the balance sheet.

Examination reminder: a control account total must always be traceable back to real, individually posted transactions in the subsidiary ledger; provisions and estimates, which are not tied to specific customer transactions, never appear in it.