Guehi can sign a pre-contract with an overseas club at the turn of 2026 with Bayern Munich, Real Madrid, Barcelona, Atletico Madrid and Inter Milan among the foreign sides to have shown an interest.
In England, Liverpool and Manchester City are both interested in the 25-year-old.
Guehi came close to moving to Anfield in the summer window after the clubs agreed a £35m fee.
But the deal collapsed on deadline day after Palace failed to sign a replacement.
