Nottingham Forest have asked Uefa for clarity after expressing their concerns over Crystal Palace's Europa League place.
The Eagles won the FA Cup to qualify for Europe for the first time in their history, but Uefa must decide if they have breached it's multi-club ownership rules.
Uefa's final ruling will centre on American businessman John Textor, owner of Eagle Football - which holds a 43% stake in Palace.
Eagle Football also owns a 77% stake in French side Lyon, who - like Palace - have qualified for next season's Europa League.