Review Sales Invoice and Shipping Log
Files for Missing and Duplicate Items
Searching for missing and/or duplicate transactions is another important test that helps the
auditor corroborate or refute the completeness and accuracy assertions. Duplicate and missing
transactions in the revenue cycle may be evidence of over- or understated sales and accounts
receivable. Duplicate sales invoice records may indicate a computer program error
that materially overstates sales and accounts receivable. On one hand, a missing sales invoice
may point to an unrecorded sale that was shipped but not billed, thus understating
these accounts. On the other hand, it may indicate nothing more than an invoice that was
issued and voided because of a clerical error.