Kaka's father and advisor Bosco Leite is scheduled to arrive in Italy later on Monday to talk with AC Milan about his son's possible world record move to Manchester City.
Angry Milan supporters, who want the club to keep the Brazil playmaker, are due to mark the occasion with another round of protests at the Rossoneri's city centre headquarters, fan websites said.
Fans chanted and painted graffiti outside the club offices at protests last week while dozens of banners demanding Kaka is kept at the club were unveiled at Saturday's 1-0 home win over Fiorentina.
Media reports have said Premier League City, the richest club in the world after their takeover by Abu Dhabi United Group, have bid 110 million euros ($146 million) for the 26-year-old.
Milan have said they will take their time to consider the bid and that no decision has been made by the club or the player.
Italian media have said Kaka does not want to go to City but that the transfer could still go through. The Brazilian was chased by Real Madrid last year and Milan acknowledged his father held talks with the Spanish club.