Signing a document - what could be easier? It takes a few seconds. But do it several thousand times and the task gets more onerous. The likes of US President Barack Obama and the Queen would spend weeks dealing with documents like Christmas cards and letters, not to mention risking serious repetitive strain injuries.
Many famous people use a device called a ghostwriter, an autopen or a signing machine. It copies the signature from a template and reproduces it many times using a real pen. This is deemed more authentic than simply printing a scanned signature.
But there are questions of legality to consider.
