Transfer deadline day is here and there looks to be a flurry of activity to take place in the final hours as Liverpool, Arsenal and Manchester United hope to improve their squads before time runs out.

Liverpool head into the final day having made no additions to Arne Slot's squad despite rumours persisting throughout the month. The Reds have been linked with Bournemouth left-back Milos Kerkez who could turn understudy to Andrew Robertson whose contract expires in the summer of 2026.

The 21-year-old Hungarian international is touted to cost around £40million but is not expected to leave the Vitality Stadium before Monday's 11pm deadline. Elsewhere, briefly-linked playmaker Xavi Simons made his stay at RB Leipzig permanent, moving from PSG for a fee in the region of £40million. Ajax defender Jorrel Hato was also reported to be a target for Slot but nothing is expected to materialise before Monday's deadline.

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Everton are still hoping to get their move for Carlos Alcaraz over the line, although it appears that is the only deal they are still waiting on. But, if any singings are to make the switch to Anfield or Goodison Park after the deadline, the club would need to submit a 'transfer deal sheet'.

While it may seem to be straightforward paperwork, they are vital when it comes to sorting out a late transfer and have left several clubs red-faced in the past.

What is a transfer deal sheet?

As mentioned, the window closes at 11pm UK time. To confirm that a deal for a player has been agreed before the market closes, a transfer deal sheet must be filled out to allow for more time to thrash out any last minute details. The concept was introduced to the Premier League in 2008.

Due to the hectic nature of Transfer Deadline Day, some clubs have mere minutes to fill out the document and ensure the move can take place.

Once submitted, the clubs have an additional two hours to get any potential signing over the line if the sheets are completed correctly. Failure to dot the I's and cross the T's before the two-hour extension renders any deal invalid.

The information on the sheet itself is simple - signalling which player will be making the switch, the clubs they are moving to and from, the transfer or loan fee and any other potential add-ons.

What role does the Premier League have in a transfer?

In order to register a player, clubs have to send the Premier League all documents relating to the transfer, including the contract, the transfer agreement, permission to work in the UK, if required, international clearance if transferring from abroad as well as any transfer levy that may apply.

According to the Premier League, officials from the competition will approach clubs as the deadline approaches to ask whether they are planning to complete any business so that the Premier League's Football Operations and Regulatory departments are prepared.

The league's office is staffed up until the 11pm deadline should any queries from clubs come.