Affidavit proving debt requirements: creditor must detail account, state security or preferential claim, and list vouchers. Affidavit proving a debt must include a statement of account showing particulars of the debt, specify any vouchers that substantiate it, and state whether the creditor is a secured creditor or a preferential creditor, setting out particulars of the security or preferential claim; the affidavit must be in the prescribed form.