FWIW, have seen two signatures by a former president that looked like he used whatever was on hand. One looked like a felt tip, and the other a ball point. It may be that there are the "expensive" ones for signing ceremonies, and "cheap" ones for everything else.
There is also a machine called an automatic signature machine used by some presidents and officials. The one I saw on TV had a huge disk connected to a sort of pantograph arraingment connected to a pen. Don't know what that used.
There is also a machine called an automatic signature machine used by some presidents and officials. The one I saw on TV had a huge disk connected to a sort of pantograph arraingment connected to a pen. Don't know what that used.