Manchester United could still recoup the fee they initially paid for Wilfried Zaha after Crystal Palace co-chairman Steve Parish revealed a "big sell-on fee" in the event of the player leaving Selhurst Park again.
Zaha, 22, sealed a permanent return to south-east London on transfer deadline day after initially joining the club on a season-long loan deal.
The winger was Sir Alex Ferguson's last signing as United manager when he joined the club for an initial £10m fee but Zaha failed to make an impression at Old Trafford, registering just two appearances for the club.
While the fee for his latest move has not been disclosed, a number of reports suggest Palace have paid just £3m to bring the player back to the club.
But United could still see more of a return with a number of add-ons included in the deal.
"There is a big sell on fee for United so we will be very happy if eventually they get their money back," Parish was quoted as saying in the Evening Standard.
"That would mean he has been very successful for us. It was clear there probably was not a future for him at United so we worked with them to do a deal that worked for both clubs.
"Hopefully we can get him back on track. He has had more or less a season out when he came to us and it takes time to get used to the game again. But he is finding his feet and has very effective for us."
After scoring on his return to the club against Newcastle United in September, Zaha struggled for game time under the management of Neil Warnock. But following manager Alan Pardew's arrival, the Palace youth product has enjoyed a revival of sorts and is hopeful of that continuing.
"I wasn't getting much game time at Manchester United so took the opportunity of coming back on loan this season and to now have the chance to make the move permanent and come home to Selhurst Park is something I'm delighted about," Zaha told Palace's official website.
"For me to be a better player, I need to play more games and having a gaffer that, I know, has great trust in me gives me the confidence I need to help me improve my game."