Sometimes it is not easy for clubs to get everything on a deal completed and sent over to the Premier League by the deadline.
The deal sheet allows a club to confirm that a deal has been reached and to allow for additional time to submit the remaining documentation.
The sheet cannot be used until two hours before the deadline and needs to arrive fully completed before the transfer window closes.
Once the sheet arrives, clubs have an additional two hours after the window closes to submit the full paperwork.
But if a club are looking to complete an international transfer, they still have to comply with the FIFA Transfer Matching System of deadline of midnight that evening.