We have already seen some eye-catching free transfers this summer, with decorated stars moving on for nothing - except for the massive signing-on fees they pocket at their new clubs.
Paul Pogba, Christian Eriksen, Divock Origi, Gareth Bale, Dani Alvez, Ivan Perisic and Angel di Maria are just a few of those who have benefitted from a Bosman deal.
Pogba has gone back to Juventus, while his former side Manchester United have landed one of the signings of the summer in Denmark star Eriksen.