Hull City are under investigation by UEFA over a breach of Financial Fair Play laws.
Hull competed in the Europa League earlier this season.
The Hull Daily Mail says the issue surrounds the way City are funded by owners Assem and Ehab Allam. In their last accounts, it showed they have loaned the club around £64.8m via their holding company Allamhouse Limited, rather than injecting capital into it to be written off.
This means City would not meet the UEFA-imposed criteria surrounding certain "potential break-even breaches".
