✔ 最佳答案
Without:
1. you physically being in front of the bank counter
2. your signature
3. your bank card
4. a piece of your ID (like driver's license)
Depends on the bank's policies, the only thing he can really do is put $$ into the account. Because he is not the account holder, he can't even get the balance on the account (in other words, he can't find out how much you have in your account)
However, for illegal activities, there's always a way if he tries to ...
1. trick a dumb Teller (more likely) e.g. tell him/her that he lost his bank card but trying to gain access to your account (since he has your name, account number, he just needs to find out more info about you, maybe your birthday/address, or just create a fake piece of ID with your info on it)
2. "park" the $$ in your account that he might have obtained illegally (but bank can trace where the $$ comes from, unless it's cash and he faked some signature on the deposit slip). But why would he do that ... he may not get his $$ back.
Hope I am not confusing you too much.