Greek stores often need a customer's VAT number and company name to issue an invoice. The standard checkout does not collect these details, and custom checkout fields are only available on the Plus tier.Lynk adds an optional VAT section to your cart, available to every store. Customers who need an invoice enter their Greek or EU VAT number and company name. After checkout, Lynk validates Greek numbers with AADE and EU numbers with VIES, then saves the official company details on the order.