Remy is currently on a season-long loan at Newcastle United after QPR were relegated to the Championship, and Redknapp does not know whether the Frenchman will ever return to Loftus Road.
The former Tottenham Hotspur boss told reporters: "I don't know what the deal is. I don't know what the chairman Tony Fernandes or [chief executive] Philip Beard have agreed.
"I don't know whether there's a fee agreed or not. He's certainly playing well for them. I said last season that he's a 10 to 15-goal a season man."
Remy has scored five goals in five Premier League games this season.