As part of the company registration process in Payhawk, EU companies must provide a valid VAT number. This is used for invoicing, proper tax reporting, and enabling VAT reclaim or reverse charge mechanisms where applicable.

A valid VAT number is one that can be successfully verified through the European Commission's VIES system.

In some EU countries, such as Spain, the VAT number may share the same format as the local tax identification number (TIN). However, for Payhawk, it is only valid if it is registered and verified in VIES.