Can a 21 year old terminate life insurance policy that your enstranged father took out on you after birth?

Sure. But let me let you in on a secret. The insurance company doesn't want to lose your business, so they'll hint that you can't cancel. Untrue. You could've cancelled at age 18 and 1 second, if you so desired. All you simply have to do (whispering now) is borrow the cash values in the policy. They'll charge you a percent, somewhere between 5 and 15%. That's ok. Get the check then send another letter to the company cancelling the policy. When they start harrassing you about the money you owed, tell them that you borrowed YOUR OWN MONEY! and to leave you alone. Need some money? Press charges. OK. Normal tone now. LOL. Go for it! LUKHIWO! I do caution you. Make sure you already have a good 20 year level term on yourself, for you might not be insurable due to health. If you're not insurable, don't cancel the policy. Sin Loi.

Not that I'm aware of. You're Father only had to show "insurable interest" at the time the policy was taken out. I presume he's the owner of the policy, so he controls it. Also, that he's paying the premium. Let it go, forget about it.

Actually if you check into it with the insurance company customer service department I think you will find that you are now the owner as of the date you turned 21. As owner you can terminate it or change beneficiary or ownership, etc. I suggest you look into keeping it as you will never find the same insurance cheaper.