How are the deceased still signing?

[Mr. Zipper]

Originally Posted by Bilko G

Yes, as with all autographs, unless you get the auto in person there is no guarantee of authenticity.

There is also no guarantee the sun will rise tomorrow. It's theoretically possible everything we know could end at any moment due to some sort of cosmic apocalypse.

I understand the sentiment that "unless you get the auto in person there is no guarantee of authenticity" and see it repeated a lot here. However, in the case of many, many autographs not obtained in-person, you can be assured they are authentic with a very high degree of certainty.