Harold is a flexible automation tool for new and legacy ERPs, built to stop bad data from entering a business. It extracts, checks, and fixes documents before they hit the systems that depend on them. Most document tools extract data, but Harold is designed to make that data right: missing fields, incorrect totals, wrong VAT, bad supplier IDs, and manual checking are caught before they break downstream workflows. AI pulls data from any document, including invoices, receipts, purchase orders, and statements, then rules validate the information automatically, and clean data is sent straight to an ERP, accounting tool, or Zapier flow. Users can upload documents or email them to a unique Harold inbox; Harold extracts headers, totals, line items, and references into structured data; checks run automatically; and issues are flagged or fixed before export. Data can land cleanly as CSV, Excel, ERP output, or an automated Zapier flow.