Real use caseSmall business
Turn supplier invoice emails into a spreadsheet, with the sums checked before anything is saved
A consultant who builds workflows for small UK businesses shared a free n8n template. It only watches one Gmail label for supplier invoices, has an AI model read each PDF into fixed fields like supplier, dates, net, VAT and total, then checks the math in plain code: net plus VAT has to match the total and the line items have to add up. Invoices that pass go into a Google Sheet, and anything that fails lands on an Exceptions tab with the reason, so a person takes a look. She notes it can't read scanned invoices and doesn't catch duplicates yet.