An elderly parent is no longer able to make medical or financial decisions for themselves
A disabled child becomes an adult -- The Health Insurance Portability & Accountability Act ("HIPAA") may prevent the parent from access to the child's medical records unless the parent is named the "Guardian of the Person"
Financial transactions with minors: A child needs to make a financial transaction or has received a gift or inheritance in their own name, such as the proceeds from a relative's life insurance policy



