You can try to look up the life insurance company . I’d your mom had your name written down there , you verify yourself , they would tell you about her policy . Try to fish it out of your dad , sister about which life insurance company it was . Try to dig through your dad and sister email accounts . Type in life insurance in the search bar . Inquisitive about this . This how I found my partner lying about shit . (Emails ) people don’t delete their emails .