A deal sheet is a crucial piece of paperwork required for all transfers, but is particularly useful on deadline day for Arsenal, Chelsea and Tottenham.
Another record transfer window in England is upon us and Premier League clubs are expected to surpass the £2billion mark this year.
At this point, the deal sheet is crucial as the key piece of paperwork which can be submitted up until 11pm. As long as a 'deal sheet' is sent in to the relevant governing bodies before the deadline, deals can still go through after the cut-off.
So what exactly is a 'deal sheet'? The form is a simple document that is required to be filled out to confirm negotiations have been completed between the two parties.
This allows clubs to be granted 'extra time' to get the deal done - but this can only be submitted between 9-11pm. Should a deal sheet be submitted in this two-hour period, all the documentation must be fully completed in order for it to be allowed.
This gives clubs an extra two hours to get a deal done and is a system which allows for snags in a process which can have multiple stakeholders and millions of pounds changing hands.
It's a different situation for international transfers. If a Premier League club completes a transfer from overseas, they would need to comply with the FIFA Transfer Match System deadline of midnight.