Invoice-to-PO Matcher

A ready-to-import n8n workflow. Watches a shared mailbox, extracts supplier, amount, date and PO number from each invoice — PDF or scan — and matches it against your open purchase orders. Exact matches post automatically; anything ambiguous goes to a human with both documents side by side.

Ships as JSON you import and point at your own credentials. Nothing runs on our infrastructure and no invoice leaves your network.

• Teams already running self-hosted n8n
• Two- and three-way matching against an ERP
• Suppliers who send PDF invoices by email

• Organisations with no purchase-order discipline
• Anyone not willing to self-host

Accounts payable keys the same numbers twice — once off the invoice and once off the PO — and the mismatch is only found at month end.