Mr Cowell, known for spotting talent on TV shows such as The X Factor and Britain's Got Talent, is yet to file a defence to the claim. She said it was “difficult to communicate” with Mr Cowell, who was “unpredictable” and “extremely emotional”. The napkin agreement was later written up and signed by Mr Cowell in February 2023 at his Cotswolds home, Ms Ratcliffe said. Mr Rosenblatt claims he invoiced Mr Cowell in 2025, but has not been paid. A spokesperson for Mr Cowell declined to comment, the PA News Agency reports.