In the mid 1970s I had two coworkers who were born during WWII.
One was from Japan.
The other was born in Nazi Germany and she said her birth certificate, as all born then, had Adolph Hitler’s signature on it. She said “I know it was a rubber stamp but it was the official one with his signature.”
Creepy.
Back in the 1990's, I used to listen a lot to Alan Keyes (that's a talking head from the past). He used to talk about how the Constitution was supposed to get us away from monarchy rule and have us be a nation of laws. The use of an Autopen - or a rubber stamped signature - is the rule of using the rulers name to get things done. Sort of like, "can someone rid me of this troublesome priest?"