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Project 10 / Finance operations
Invoice & Accounting Operations
Enforces approvals and purchase-order matching before creating a duplicate-safe draft bill.
01 / Problem
Finance workflows require strict controls because a duplicate or unapproved write creates real monetary exposure.
02 / System
Designed as a controlled operational pipeline.
The system validates invoice data, checks first and second approvals, performs PO matching and applies both event-level and business-key deduplication.
01
Approved matched draft bill
02
PO mismatch routed to finance
03
No payment execution
03 / Reliability controls
What keeps the system honest.
Two-key deduplication
Approval hierarchy
PO match
Draft-only ledger write
Technology contract
n8nProcurement APIAccounting APISQL
04 / Verification
Actual n8n webhook
Actual n8n webhook passed nine approval, matching, duplicate, handoff, validation and outage paths.
Evidence boundary
Read the full evidence method This is a locally verified engineering demonstration using synthetic data and controlled service adapters. It is not described as a production client deployment unless live evidence is added later.