What do to have my brother's military annuity checks sent to me? My brother is mentally handicapped.?

My brother is a military dependent from birth and can not handle my dad's annuity checks. He is mentally handicapped 60 year old. Do I need to become his legal guardian? Our dad was in the military for 30+ years.What do to have my brother's military annuity checks sent to me? My brother is mentally handicapped.?Seek a legal clinic for advice. You probably need to become a conservator or legal guardian or something.