Built Bank Reconciliation Workflow After Client Missed Fraud 🔥
Client called me Monday morning. Frustrated tone in voice. "We keep missing problems in our bank statements. Just discovered $7,500 unauthorized transaction from 4 weeks ago. Bank's fraud protection window? Only 10 business days. We're too late to dispute now." Lost the money completely. Their reconciliation process: accountant downloads PDF monthly from bank, types every single transaction into Excel manually one by one, looks for anomalies whenever has time available. Problem: "when has time" meant 3-4 weeks after statement actually arrived each month. THE AUTOMATED WORKFLOW Built n8n workflow eliminating manual work completely. New statement uploaded to Google Drive folder? Workflow triggers automatically. Downloads file. Extracts all transaction data. Categorizes using keyword rules. Flags anomalies instantly. Logs summary to Google Sheets. Sends Slack alert if issues found. THE EXTRACTION Pulls complete data from PDF: Account number and statement period Opening and closing balances All transactions: dates, descriptions, debits, credits, running balances Transaction totals Complete structured dataset THE ANALYSIS Categorization rules: Payroll: salary, payroll, wages Utilities: electric, gas, water, internet Food: restaurant, grocery, food Transportation: uber, gas station, parking Uncategorized: manual review needed Anomaly detection: Large transactions: over $5,000 Negative balances: any occurrence Balance mismatches: validation errors All flagged with details THE RESULTS Before automation: 4 hours monthly manual data entry 3-4 weeks processing delay Inconsistent categorization Fraud found too late After automation: 30 seconds automated processing Same-day processing when uploaded 100% consistent categories Immediate fraud alerts First month deployed: Statement with 312 transactions processed in 30 seconds Flagged $4,800 charge immediately Team contacted vendor same day Discovered legitimate but unusual purchase Verified and approved within hours