10 cash envelope from Juventus were sent to Italy via the post.
The letter is handwritten and the envelopes are labelled with the names of the players.
The envelopes also contain a signed note.
The transfer fee was €3.7 million.
Juventus will receive the money from the Juventus Foundation.
According to the report, the players were also promised a house, car and the right to use the hotel.
The club will receive a further €2.2 million from the players and Juventus Foundation in the future.