Real Madrid president Florentino Perez says Casemiro will be honoured with a special farewell.
Casemiro was formally sold to Manchester United on Friday night.
Florentino remarked: "Casemiro is a Real Madrid legend and he had every right to decide his future because he deserved it.
"Next week we will hold a farewell ceremony for him."
Casemiro has signed for United in a €70m deal.