KHL
Kontinental Hockey League players under 28 years of age as of July 1 of a given calendar year whose contracts are expired are considered restricted free agents. Just like the NHL and the NBA, the original team of a player who signed an offer sheet tendered by another team has seven days to match the offer sheet. However, unlike its North American counterpart, teams that decide not to match offer sheets collect transfer fees instead.
Read more about this topic: Restricted Free Agent