TAXATION
GME's fees are classified as generic services. For VAT purposes, it must be checked the place where the customer is established as mentioned in Article 7 ter of the Presidential Decree 633/72, which implements Article 44 of Directive 2006/112/EC.
Therefore, GME issues a regular invoice with VAT when the customer is an entity based in Italy, except in the case where the Italian customer is a regular exporter, pursuant to Article 8, paragraph 1, letter c) of the Presidential Decree 633/72. Therefore, an invoice without VAT will be issued.
GME, on the other hand, issues an invoice without VAT when the customer is a taxable EU participant in its own Country. In this case, it is the participant that applies the reverse charge.
In case of a non-EU participant, GME issues an invoice without VAT.
Participants, based in Italy for which the VAT payment system called "split payment" is applied, are required to submit to GME a specific self-certification made pursuant to Article 47 of the Presidential Decree 445 of 28/12/00 certifying its status.
An example of a declaration for the status of participant subject to split payment can be found here
The list and description of codes used by GME for invoicing fees are available here.