by hand
Tu lui as remis la police en mains propres ?
Did you hand the police over to him personally?
— Assurance sur la mort (1944)
Je préfère la lui remettre en mains propres.
I prefer to hand it to him personally.
— Lust, Caution (2007)
C'est à remettre en mains propres.
It must be handed over in person.
— Kiki la petite sorcière (1989)