Premier League clubs have been preparing for what has been described as the 'unofficial transfer deadline day' on Sunday.
To avoid charges and possible points deductions clubs must be compliant with profit and sustainability rules (PSR) - and 30 June is a key date.
Officially the summer transfer window does not close until Friday, 30 August but, as Nottingham Forest discovered to their cost last season, some Premier League clubs need to get business done now.
Sunday marks the end of the financial year in the Premier League, meaning clubs need to ensure they are compliant with PSR as they submit their accounts.