Expense Auditor
Validate expense reports for policy violations, duplicates, and fraud red flags
What You Can Do
Systematically review submitted expense reports by validating each line item against configured policy rules, category spend limits, and receipt requirements. The skill detects duplicate submissions within configurable time windows, identifies suspicious spending patterns including category spikes and after-hours activity, compares individual employee spending against peer and historical baselines, and generates audit-ready reports with severity scoring and fraud indicators—enabling controllers and compliance teams to catch policy violations and potential fraud before reimbursement.
Features
checks each expense line against category limits, receipt requirements, and merchant restrictions configured in your corporate policies
identifies matching submissions by amount, date, and merchant within configurable time windows to prevent duplicate reimbursement
flags spending anomalies including category spikes, after-hours submissions, and merchant blacklist matches
extracts and highlights expenses missing required documentation or receipt evidence
analyzes individual employee spending against department and role-based peer groups to surface outliers
ranks findings by risk level (critical, high, medium, low) to prioritize review effort on high-impact issues
generates compliance-focused reports with violation metadata, root-cause indicators, and exception summaries
compares current submissions against employee spending history to identify behavioral changes
Example Output
Expense Report Audit Summary — Jane Smith (Sales) — Oct 2024
✓ Critical Findings (2):
- Duplicate claim detected: Airbnb $487.50 on 10/15 (matches 9/15 submission, 30-day window)
- Missing receipt: Meals & Entertainment category $340 total (3 line items without documentation)
⚠ High Risk (3):
- Category overspend: Meals & Entertainment $2,105 YTD (policy limit: $1,800/month, currently 17% over)
- Merchant blacklist match: Uber Eats flagged 8 times (policy restricts to approved vendors only)
- After-hours pattern: 12 submissions between 11 PM–3 AM (peer average: 2, suggests potential personal expenses)
→ Recommendation: Hold reimbursement pending: (1) duplicate claim reversal, (2) receipt submission for $340, (3) policy clarification on meals budget overrun.
What's Included
- SKILL.md instruction file with prompt templates for policy validation and duplicate detection:
- Policy Rule Checklist: template for mapping your corporate expense categories, limits, and receipt requirements
- Audit Report Framework: markdown template for generating compliance-ready findings with severity tiers
- Pattern Detection Workflow: step-by-step guide for configuring baseline thresholds (category spend, submission frequency, peer benchmarks)
- Duplicate Detection Matrix: reference table for time windows and matching criteria by transaction type
Who It's For
- Controllers and Expense Managers — reviewing high-volume monthly and quarterly expense submissions
- Internal Audit Teams — conducting compliance audits and policy effectiveness reviews
- Finance Business Partners — validating department spending and enforcing corporate policy
- Accounts Payable Teams — catching violations at the policy enforcement point before reimbursement processing
- CFO Office/Finance Leadership — running quarterly spend analytics and fraud risk assessments
Best For
- End-of-period batch audits — validating 50+ monthly expense reports against policy in a single review
- Compliance and fraud screening — flagging duplicate claims, missing receipts, and behavioral anomalies before payment
- High-risk department reviews — auditing departments with frequent policy violations or elevated spend
- Post-acquisition integration — validating expense data when merging legacy systems or expense policies
- Employee spend pattern analysis — comparing individual and team spending against baselines to identify outliers or policy drift
You might also like
You can systematically validate employee payroll records, cross-check tax withholding calculations against current tax brackets, verify regulatory compliance across federal/state/local requirements, and flag anomalies that could trigger penalties—all before executing payment runs. This reduces processing time by 40-60% while catching errors that manual spreadsheet reviews typically miss, working across ADP, Workday, Gusto, and manual payroll systems.
by eryet
You can analyze transaction clusters to identify layering, placement, and integration schemes using proven AML methodologies. Claude applies typology frameworks to suspicious fund flows, cross-border movements, and beneficiary ownership chains—transforming raw transaction flags into regulatory-grade narratives that justify SAR escalation and withstand compliance audits.
by eryet
You systematically extract financial red flags from claim submissions, construct causal narratives linking evidence to fraud conclusions, and quantify potential loss exposure. This skill helps you distinguish between legitimate claim variations and fraud indicators, enabling you to generate investigation summaries defensible in litigation, settlement negotiations, or Special Investigation Unit (SIU) presentations.
by eryet
This skill helps you audit nexus comprehensively by analyzing physical presence rules, economic thresholds, affiliate connections, and marketplace facilitator statutes across all 50 states and relevant localities. You'll document nexus triggers specific to your client's business model—whether they're selling through marketplaces, using drop-shipping, hiring remote employees, or expanding operations. The result is an actionable filing calendar and remediation strategy that minimizes compliance gaps and protects against substantial back-tax assessments, penalties, and interest.
by eryet
You can allocate indirect costs (administration, utilities, depreciation, maintenance) across clinical and non-clinical departments using activity-based costing (ABC) and traditional allocation methodologies. This skill helps you calculate precise allocation rates, model reimbursement scenarios, validate cost driver selections, and document allocation methods for compliance—enabling data-driven decisions on service line profitability, pricing strategies, and payer contract negotiations.
by eryet
You can execute structured compliance audits that map regulatory requirements to operational controls, test control effectiveness with documented evidence, quantify compliance risk exposure, and track remediation progress with clear accountability. The framework produces audit findings in regulatory-acceptable format, transforming ad-hoc reviews into defensible procedures that satisfy internal audit standards (IIA) and regulatory expectations.
by eryet
You can analyze insurance claim files to uncover fraud indicators by synthesizing evidence from policyholder statements, medical/repair records, financial documents, and prior claims history. This skill helps you reconstruct timelines, identify inconsistencies and impossibilities, recognize suspicious financial patterns, and build defensible fraud conclusions suitable for claims adjustment, litigation support, or settlement negotiations. Transform raw claim data into an evidence hierarchy distinguishing confirmed facts, supported inferences, and investigative leads requiring further development.
by eryet
You can systematically prepare tax provisions that survive audit scrutiny by calculating current and deferred tax impacts, reconciling effective tax rates from statutory to reported amounts, and documenting uncertain tax positions with FIN 48 support. The skill guides you through multi-jurisdictional tax exposure analysis and helps you create audit-ready workpapers with clear audit trails for quarterly (10-Q) and annual (10-K) financial statement filings.
by eryet