[mawise]

This is a problem. I initially couldn't get my wife's Grandmother to see the site because sending her a password was too complicated. I have since implemented magic links for login. When you create an account for someone you can share a magic link with them or an email/password combination.

[mozey]

Interesting idea, maybe combine it with some fingerprinting? I.e. the first access on the link binds some attributes, and if they change the link expires. Chances are people who need these links are only using one device.

[wintermutestwin]

Magic links sounds like a perfect solution.

[paxys]

It doesn't stop them from (knowingly or unknowingly) forwarding the link to someone else.