FA Cup winners Palace risk being blocked from the competition due to UEFA's multi-club ownership rules. John Textor holds a minority share in Palace, while he also owns fellow Europa League qualifiers Lyon. The French club have preference due to their superior league finish last season.
Textor missed a deadline to place his Palace shares into a blind trust to assure UEFA of no co-operation between the clubs. As such, Palace are in danger of being blocked from participating in the Europa League.
BBC Sport says UEFA aren't expected to make a ruling until the end of this month.
Both Textor and Palace chairman Steve Parish stated their case on Monday at UEFA's HQ in Nyon.
