Take the money from your bank account? No, the bank must have your signature, it's your money, not your moms. (My parents have borrowed money from me before and I had to be there to give a signature.) She can however put money in your account without you there, but not take it out. hmm. I guess I'm wrong according to everyone else.
Only if you allow it. I these days of identity theft, your bank SHOULD protect you, your money, & your ss#. If the bank you are currently using won't take care of you, close the account & go to a bank that will. **** My ex-wife had credit cards opened in all of our children's names to feed her gambling habit. That's criminal behavior & damaged my children's credit reports for years. What your mom is doing is not as damaging, but still very wrong.
I'm sorry to hear she's violated your trust. I had this happen when I was your age. It still makes me furious. But to answer your question yes she can. You are a minor and she can take what is rightfully yours. It isn't fair and it isn't right. and I am sorry.
I have worked in different financial institutions for 10 years and in my experience it has to do with the way your account was open and what kind of account it is. I live in California, and UTMA account will allow a child actor, singer, etc to have an account where he is the only person allowed to take money out. This UTMA accounts usually get open with a certified and notorized letter, and it has a lot of requirements. After all, you are a child and your better judgement can sometimes be cloudy. Also, such account is very rare hence I doubt this is the account you have.