Tests of control should be designed to check that the control procedures are being applied and that
objectives are being achieved. Tests may be appropriate under the following broad headings.
(a) Carry out sequence test checks on invoices, credit notes, dispatch notes and orders. Ensure that all
items are included and that there are no omissions or duplications.
(b) Check the existence of evidence for authorization in respect of:
iii. acceptance of the order (the creditworthiness check)
iv. dispatch of goods
v. raising of the invoice or credit note
vi. pricing and discounts
vii. Write off debtors as bad debts.
Check both that the relevant signature exists and that the control has been applied.
(c) Seek evidence of checking of the arithmetical accuracy of:
viii. invoices, including pricing, and VAT and sales tax calculations
ix. credit notes,
This is often done by means of a 'grid stamp' containing several signatures on the face of the document.
Ensure that the control has been applied by checking the accuracy of such invoices and credit notes.
(d) Check dispatch notes and goods returned notes to ensure that they are matched with invoices and
credit notes.
(e) Check that control account reconciliations have been performed and reviewed.
In all cases, tests should be performed on a sample basis