Transfer deadline day is a stressful time for Premier League clubs keen to get all of their business wrapped up in advance of the window shutting.However, these things are rarely so straightforward, with agents, players and clubs always looking to get the best deal. Indeed, sometimes transfers are not agreed until the last possible minute, which inevitably leads to a frantic scramble from clubs and their administrative staff.Occasionally, late agreements can scupper the completion of a deal, as happened with David de Gea's infamous proposed switch from Manchester United to Real Madrid in 2015.However, a grace period can be granted through the use of 'deal sheets'. GOAL brings you everything you need to know about what they are.The deal sheet is simply a form which is filled out to confirm that negotiations have concluded and that a deal has been reached between the parties.When a transfer deal has been agreed between clubs at the last minute it may not be possible to get every last bit of documentation completed and sent before the deadline.In such cases, it is possible to be granted additional time in order to take care of paperwork by making use of a deal sheet.*An example of a deal sheet can be seen in the above image.The deal sheet can only be used in the two hours before the deadline and it must be received by the league before the deadline passes.After the successful submission of a deal sheet, clubs are granted a further two hours after the deadline in which to get the loose ends tied up.It is slightly different for international transfers, which requires clubs to comply with the Fifa Transfer Matching System deadline of midnight.The process of finalising a transfer concludes with the registration of a player with the league.As part of this, clubs must sent all the documents related to the transfer, such as the following:As you would expect with late deadlines, the Premier League offices are staffed well into the night in order to ensure the swift and efficient handling of the process.A fax machine was once an essential piece of equipment when it came to transfers and, much to the chagrin of those involved in deals, it was responsible for the odd delay.However, we are now living in the age of the internet and the fax machine has been rendered more or less obsolete.Most clubs have embraced 21st century technology and documentation is generally sent via email, with forms being scanned or sent by desktop fax.There are two transfer deadline days in the Premier League, one occurring in the summer and one in the winter.The winter 2026 deadline day is February 2, 2026.