1.
If you hand something over to someone, you pass it to them.
He also handed over a letter of apology from the Prime Minister...
‘I’ve got his card.’ Judith said, handing it over.
PHRASAL VERB: V P n (not pron), V n P
2.
When you ~ someone such as a prisoner to someone else, you give the control of and responsibility for them to that other person.
They would just catch the robbers and hand them over to the police...
PHRASAL VERB: V n P to n
3.
If you ~ to someone or hand something over to them, you give them the responsibility for dealing with a particular situation or problem.
The present leaders have to decide whether to stand down and ~ to a younger generation...
I wouldn’t dare hand this project over to anyone else...
PHRASAL VERB: V P to n, V n P to n, also V n P, V P n (not pron)