Electronic invoice, if it is a special electronic invoice for value-added tax, there is no special invoice seal on the invoice; If it is a VAT electronic ordinary invoice, due to different invoice systems, some invoices are stamped with special seals, and some do not need to be stamped with special seals. No matter whether it is stamped with the special invoice seal or not, as long as it is issued by the invoice system implemented by the tax authorities, it is a valid invoice.