Relating to my experience only, many years ago I worked very close with old established companies in Germany with regards to signatures. They would never just grab up a signature and use it. Someone had to authorize the use of that signature especially if it was a person of stature and used on something of importance. This was done by requesting the individual write his/her name down three times and then choose the one signature that was to be used. The old timers related to me that this was the method used for as long as they could remember.
