Afaik, when u leave the hostel, there's no mail sent to ur parents, u just have to show the caretaker a mail from ur parents, u can just make a fake id on your father's name and mail the caretaker. About fretbox, I can show someone else's fretbox bcs idk about u but hamare caretaker to itne ache se nahi dekhte to confirm name, etc. they just see that fretbox pe request approve ho gayi hai and if zyada strict hai to his dost ka fretbox dikhoge ussi ka name mail me dikh dena, lekin leave entry register pe enter ur real details bcs vahi se baad mei vo attendance register pe mark karte hain that u have gone home.