OpenAuditor bloghttps://openauditor.ai/blogExperiments and practical guides to audit evidence and AI verification.en-usThe batch boundary changed the audit verdicthttps://openauditor.ai/blog/duplicate-invoice-detectionhttps://openauditor.ai/blog/duplicate-invoice-detectionThe same payments expose a $100 excess together and pass separately when comparison history is omitted. A controlled experiment in audit scope.Thu, 01 Oct 2026 19:00:00 +0000The bank account matched. It still wasn't the supplier's.https://openauditor.ai/blog/audit-evidence-and-audit-trailshttps://openauditor.ai/blog/audit-evidence-and-audit-trailsSeven checks hold in two synthetic supplier-bank scenarios. Why agreement with a vendor master does not establish account ownership.Thu, 01 Oct 2026 19:00:00 +000099.5% of which decisions?https://openauditor.ai/blog/ai-verification-false-positiveshttps://openauditor.ai/blog/ai-verification-false-positivesWorked counterexamples in verification error budgets, abstention and selection: why a configured certainty target needs a denominator.Thu, 01 Oct 2026 19:00:00 +0000Three-way invoice matching: where the exceptions beginhttps://openauditor.ai/blog/three-way-invoice-matchinghttps://openauditor.ai/blog/three-way-invoice-matchingCompare invoices, purchase orders and receiving records, then investigate quantity, price and timing differences before payment.Thu, 01 Oct 2026 19:00:00 +0000Is your audit population complete? Checks before testinghttps://openauditor.ai/blog/audit-population-completenesshttps://openauditor.ai/blog/audit-population-completenessReconcile record counts, control totals and source-system filters before relying on an audit extract or interpreting its exceptions.Thu, 01 Oct 2026 19:00:00 +0000How to verify claims in an AI-generated business reporthttps://openauditor.ai/blog/verify-ai-generated-reportshttps://openauditor.ai/blog/verify-ai-generated-reportsTrace statements, calculations and comparisons in an AI-generated report to source evidence, with a practical claim-review workflow.Thu, 01 Oct 2026 19:00:00 +0000Vendor bank changes: controls to check before paymenthttps://openauditor.ai/blog/vendor-bank-change-controlshttps://openauditor.ai/blog/vendor-bank-change-controlsReview supplier bank-detail changes using independent confirmation, approval history and payment timing, with evidence for each decision.Thu, 01 Oct 2026 19:00:00 +0000Risk-based audit sampling: choosing what to testhttps://openauditor.ai/blog/risk-based-audit-samplinghttps://openauditor.ai/blog/risk-based-audit-samplingSeparate targeted risk selection from representative audit sampling, document the population and interpret findings within their limits.Thu, 01 Oct 2026 19:00:00 +0000How to reconcile credit notes with invoices and paymentshttps://openauditor.ai/blog/credit-note-reconciliationhttps://openauditor.ai/blog/credit-note-reconciliationMatch credits to the original obligation, check how they were applied and reconcile the remaining payable without double-counting adjustments.Thu, 01 Oct 2026 19:00:00 +0000How to resolve an audit exception with conflicting evidencehttps://openauditor.ai/blog/resolving-audit-exceptionshttps://openauditor.ai/blog/resolving-audit-exceptionsInvestigate contradictory records, retain evidence versions and document the reasoning that supports an audit exception disposition.Thu, 01 Oct 2026 19:00:00 +0000Prompt injection in business documents: protect the review workflowhttps://openauditor.ai/blog/prompt-injection-business-documentshttps://openauditor.ai/blog/prompt-injection-business-documentsKeep instructions inside submitted documents separate from review authority, and test how your workflow handles malicious or misleading content.Thu, 01 Oct 2026 19:00:00 +0000Reviewing expense policy exceptions without losing the audit trailhttps://openauditor.ai/blog/expense-policy-exceptionshttps://openauditor.ai/blog/expense-policy-exceptionsAssess business expense exceptions against the applicable policy, approval authority and supporting records while preserving the original finding.Thu, 01 Oct 2026 19:00:00 +0000An invoice audit checklist for accounts payable teamshttps://openauditor.ai/blog/invoice-audit-checklisthttps://openauditor.ai/blog/invoice-audit-checklistReview supplier invoices against purchase orders, receipts, approvals and payment records, with a practical checklist for handling exceptions.Thu, 01 Oct 2026 19:00:00 +0000How to assess materiality when a control exception surfaceshttps://openauditor.ai/blog/materiality-and-control-exceptionshttps://openauditor.ai/blog/materiality-and-control-exceptionsUnderstand why a policy exception and a material misstatement are different questions, and how reviewers assess both with supporting evidence.Thu, 01 Oct 2026 19:00:00 +0000How to verify AI-extracted data against source documentshttps://openauditor.ai/blog/verify-ai-extracted-datahttps://openauditor.ai/blog/verify-ai-extracted-dataCheck extracted values, source locations, field meaning and totals before data enters a business workflow. Learn how to handle unresolved findings.Thu, 01 Oct 2026 19:00:00 +0000How to verify AI agent actions before executionhttps://openauditor.ai/blog/verify-agent-actionshttps://openauditor.ai/blog/verify-agent-actionsReview tool calls against grants, limits, approvals and user instructions, with practical handling for prompt injection and unresolved checks.Thu, 01 Oct 2026 19:00:00 +0000How to review invoices against contract termshttps://openauditor.ai/blog/contract-invoice-reviewhttps://openauditor.ai/blog/contract-invoice-reviewCompare billed rates, quantities, service periods and credits with the applicable contract, and document exceptions before payment.Thu, 01 Oct 2026 19:00:00 +0000Build a batch audit review workflow from submission to resolutionhttps://openauditor.ai/blog/batch-audit-review-workflowhttps://openauditor.ai/blog/batch-audit-review-workflowPrepare a transaction population, retrieve every result and route exceptions with supporting evidence, review decisions and a traceable audit trail.Thu, 01 Oct 2026 19:00:00 +0000