How to spot VAT invoice fraud

Invoice fraud is one of the most common threats facing B2B finance teams. Criminals send professional-looking paperwork with VAT numbers that look legitimate at a glance — but are inactive, cancelled, or registered to a completely different entity. Knowing how to spot VAT invoice fraud before you approve payment protects your cash, your VAT reclaims, and your compliance record.

Red flag 1: The VAT number fails a live check

The strongest signal of VAT invoice fraud is an invalid lookup result. Before you pay any new supplier, run the VAT number through the official registry — VIES for EU member states, HMRC for GB numbers. A fake VAT number invoice often uses a cancelled registration, a mistyped digit, or a number belonging to another company entirely. Use our free VAT checker for instant results. If the check fails, follow our guide on what to do if a VAT number is invalid.

Red flag 2: Company name or address does not match

Even when a VAT number is valid, compare the registered business name and address from the tax authority to the supplier on your invoice. Fraudsters sometimes use a real VAT number belonging to an unrelated entity while invoicing under a different trading name. A live VAT fraud detection step catches this mismatch before funds leave your account. See how to check a VAT number for a company for the full matching workflow.

Red flag 3: Unusual invoice details

Watch for B2B VAT fraud signs on the document itself: a missing or malformed VAT number, a new bank account on a familiar supplier's invoice, urgent payment pressure, or contact details that differ from previous correspondence. VAT numbers should include the correct country prefix — GB for the UK, IE for Ireland, DE for Germany. Format guides are in UK VAT numbers and EU VAT numbers explained.

Red flag 4: Supplier avoids verification

A legitimate B2B partner should provide their VAT registration number willingly and resolve any mismatch quickly. If a VAT scam supplier refuses to clarify, sends inconsistent documents, or pushes you to pay before verification, treat that as a serious warning. Read why you should verify VAT numbers before every B2B transaction for the compliance and financial risks involved.

How to protect your business

Build a verify VAT before payment rule into accounts payable and supplier onboarding. Check every new partner before the first transfer, not after a dispute arises. For UK suppliers, see check VAT number in UK. For Irish and other EU partners, read how to check a VAT number in Ireland and VIES vs HMRC: what's the difference?. Keep dated records of each lookup for audit trails.

Spot fraud and verify now

The fastest way to spot fake VAT invoice schemes is a live official check that takes seconds. Visit the Check VAT Number homepage, enter the full VAT number with its country prefix, and confirm the registration before you pay — or browse more prevention guides on our blog and FAQ.