Tag #Player Registration

What are the immediate consequences of Barcelona's failure to register Olmo and Victor before the deadline?

Barcelona failed to register Dani Olmo and Pau Victor before the December 31 deadline, despite submitting documentation of VIP seating sales. La Liga and the RFEF rejected their appeal, citing lack of payment proof before the deadline. Barcelona will now file a complaint with the Consejo Superior de Deportes (CSD) to seek temporary registration.