To send the Exchange System both the FatturaPA file and archive files, a number of operations are necessary. These are defined in the Ministerial Decree 3 April 2013, Number 55 containing the implementing regulations, as provided for in the 2008 Budget Law.
The Economic Operator is whoever sends an electronic invoice to a Public Administration office through the Exchange System.
The Public Administration is whoever receives the FatturaPA file(s) from the Economic Operators through the Exchange System.
In interacting with the Exchange System, the Intermediary is whoever sends or receives the FatturaPA file(s) on behalf of either the Economic Operator or the Public Administration.