Why was Chelsea banned from transfers?

Related questions

1. Can you still loan players after transfer deadline?
2. Who is Premier League top scorer?
3. How many foreign players can play in the Premier League?
4. Do footballers get a cut of the transfer fee?
5. How much was Ronaldo's transfer fee?
6. Does player get transfer fee?
7. What would Messi transfer fee be?
8. How do Premier League loans work?
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10. Who gets the transfer fee money in soccer?

Tags

1. #players
2. #sport
3. #arbitration
4. #court
5. #foreign
6. #during
7. #their
8. #transfer
9. #january
10. #under
11. #banned
12. #chelsea
13. #signing
14. #until
15. #investigation
16. #disappointed
17. #followed
18. #blues
19. #windows
20. #appeal