When there is an international transfer, the buying and selling clubs have to register it on FIFA's Transfer Matching System (TMS) in order for international clearance to be generated.
The buying club have to upload all the information to the system and the foreign club have to match all the details.
Our FA will request clearance and, as long everything matches, the foreign association will issue clearance to the FA, who then informs the club and League.
The Premier League receives a copy because we need to ensure that players coming in have had their registration transferred to this country, or Wales in the case of Welsh clubs.
Also in this series
Part 1: What is the deal sheet in transfers?
Part 2: How do clubs begin the process of completing a player transfer?
Part 3: What is the Premier League's role in transfers?
Part 5: How does the work-permit process work for transfers?
Part 6: Rules governing the third-party ownership of players
Part 7: Is a fax machine used for transfers?
Part 8: How many loans are allowed by Premier League clubs?