[Reeses]

Do not use body parts for credentials. If a thief chops off someone’s hand to go shopping it’s pretty hard to get a replacement ID.

[Balding_Eagle]

Do not use body parts for credentials.

I'll bet you, and everyone else here, uses body parts for credentials every day when interacting with others.

[combat_boots]

There are stories of people who chop of the fingers of dead people and freeze them to provide proof - in order to get SSI benes.