Invoice VAT Preflight

Check invoice totals, VAT IDs, IBANs and due dates locally before ERP entry, with no account, server or cloud.

Invoice VAT Preflight helps accounting, accounts payable, treasury and ERP teams catch formal invoice errors before booking, approval or payment preparation. Paste invoice text, read the clipboard, check selected text, scan the visible page, or open a larger workbench. The extension reviews labelled invoice numbers, invoice dates, due dates, subtotal/base amounts, VAT/tax amounts, totals, VAT IDs and IBANs. Local checks include: - missing or duplicate invoice numbers - invoice date and due date detection - due date before invoice date - subtotal plus VAT/tax vs invoice total - single VAT rate vs detected tax amount - multiple VAT rates flagged for human review - ES NIF/NIE/CIF checksums - numeric FR VAT key vs SIREN MOD-97 - IT, PT and BE VAT checksum variants - IBAN country length and MOD-97 check digits - mixed currency markers Everything runs locally in your browser. There is no VAT registry lookup, company registry lookup, bank lookup, sanctions screening, supplier verification, payment initiation, server, login, analytics or remote code. Important: this is a formal local preflight. It does not confirm supplier identity, tax registration, invoice legitimacy, bank-account ownership, fiscal deductibility, legal compliance, sanctions status, fraud risk or bank acceptance.