Use this procedure as a reproducible screening or independent-recalculation step over records prepared on a consistent accounting basis.

Invoices

Required list input.

Flag groups of invoices that share the same case-insensitive trimmed vendor, exact finite amount, and calendar date. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Duplicate groups

The resulting duplicate groups returned as an integer.

Duplicate index groups

The resulting duplicate index groups returned as a list.

Duplicate invoices

Total invoices belonging to duplicate groups.

• A flag identifies a record for investigation; it does not by itself establish error, fraud, or control failure. Completeness, authorization, materiality, holidays, tolerances, and source-system semantics require separate evidence.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Combine the result with source-document inspection, population reconciliation, exception sampling, and documented professional judgment. Preserve the tested population and parameters for reperformance.

• Dormant Vendor Master File No-Activity Period Flag Tester

  Flag vendors whose last recorded activity is at least the dormancy threshold before the as-of date.

• Journal Entry Weekend Holiday Posting Date Flagger

  Flag journal entries posted on configured weekend days or supplied holiday dates, preferring the holiday reason.

• Three-Way Match PO GRN Invoice Field-By-Field Test

  Compare purchase-order, goods-received, and invoice quantity and amount fields and report each mismatch reason without rounding returned differences.