Electronic invoice is a replacement format, with the same legal and fiscal value, of paper invoice.
The electronic invoice is in digital format that certifies the time reference and digital signature of the invoice issuer in electronic format for the buyer, which can be saved in the original format. The documents are according to the standard of the European Union accompanied by the Directive 2014/55 of the EU, dated 16 April 2014 “On electronic billing in public procurement”.