If he does that paperwork and everything, can I pay for it each month? Or does it have to come from him? Yes, you can pay for your father's life insurance policy.
In order to buy life insurance on your father you'd need his permission and signature, plus he'd have to release his medical records, and he'd probably have to submit to a paramedical exam complete with urine sample and blood test.
In addition, there are some plans that offer senior no exam life insurance that do not require a physical examination; however, these plans may be higher in price.