Hi Fede,
Here the Annex 1 - general conditions for mono beneficiary grant agreements.
https://ec.europa.eu/programmes/erasmus-plus/sites/default/files/2020-genera...
See section II.20.2 Records and other documentation to support the costs and contributions declared The beneficiary must provide the following if requested to do so in the context of the checks or audits described in Article II.27: (a) for actual costs: adequate supporting documents to prove the costs declared, such as contracts, invoices and accounting records. In addition, the beneficiary’s usual accounting and internal control procedures must permit direct reconciliation of the amounts declared with the amounts recorded in its accounting statements and with the amounts indicated in the supporting documents; (b) for unit costs or unit contributions: adequate supporting documents to prove the number of units declared. The beneficiary *does not need to identify the actual eligible costs covered* or to provide supporting documents, such as accounting statements, to prove the amount declared per unit;
A question for you Fede, what documents and guidelines have you received from the Italian agency once the project was approved? Check if special conditions apply in your case.
Salud d