text: how would you go about getting social security money that your mom doesn't spend on the person she is told to? my mom get social security money for myself and my little brother and sister. i haven't lived with her in over a year and my grandma has to pay for every thing. i think she should have to help out. have your grandmother notify the social security administration that she has physical custody of you and your lil' bro and sis.  also, find out if she has legal custody... if she doesn't, she should file.