However, you may need your grandparent's permission and signature on the application for life insurance.
In addition, your grandparent may have to answer some health questions, and possibly take a physical exam to find out if he/she qualifies for life insurance.
Some life insurance carriers do offer up simplified life insurance without any medical exam. For instance, Globe Life Insurance may provide up to $30,000 of simplified life insurance with no exam for people age 78 and under.