The Dangerous Part Is Not Extraction. It Is Trusting Everything.

Most n8n document workflows start with a clean demo: a PDF arrives, a document node extracts fields, and a spreadsheet or database node writes the result.

That is fine until the workflow starts handling real documents. A supplier invoice has a smudged total. A receipt uses a currency symbol the parser is not fully sure about. A contract date appears twice, once in the header and once in a clause. The workflow still writes a row because every extracted value was treated as equally trustworthy.

The fix is not to send every document to a human. That kills the value of automation.

The better pattern is to let high-confidence fields continue automatically and route only uncertain fields to a review branch.…