This is an incomplete question, and needs more information to complete. Generally, only owner's of insurance policies can make adjustments to them, the main exception is if your dad is unable to handle his financial affairs and he has assigned his sister to be his power of attorney. She still has the obligation to do what is right for your father even with this power, and can put herself in legal jeopardy of she doesn't.
Aunty
Your Father's Sister is called your Aunt.
The sister of my Dad is called " Ammah" & its plural is " Ammat".
Often, yes.
my sister jodie is the best book ever and the dads name is Joe.
My father was my brother and my sister was my mother
dad's sister = maami, auntie (മാമി, ആന്റി) sister's husband = aliyan (അളിയ൯)
Sister is 15, Brother is 17 not sure about his brothers on his dads side
In Sanskrit, your dad's sister is called "Maternal Aunt" which is translated as "मातुलानि" (mātulāni).
Half blood sister
yes he has a sister, well i think he does, he also has a young brother from his dads side
Ask him or your mom to see their important papers.