Robotis

How can I use a robotic hand to forge a signature? I really hope to hack the Real World!

first you have to do image processing to fit a series of curve across a perspective corrected photo of the image you want to replicate

then implement inverse kinematic techniques in order for the robot to play back the peicewise beziers in order to hack the real world

Make sure to use the same ballpen, the victim uses, otherwise he will get more chances disproving the signature. Basically, law is helpless and investigates it only "beyond reasonable doubt", where "reasonable" is just a buzzword.

Too late, the nigger in chief already knows about this and uses it on a regular basis.
https://www.Google.com/search?q=obama+auto+pen