I agree with Leslie. If they don't want my electronic signature, call someone else to sign it.
For a few months, I have been exclusively signing and faxing back orders using the electronic document mark up feature in Updox. It is very flexible, allowing text fields, redacting (blacking out) areas, arrows, circles, check marks, and of course, a user-generated stored signature for each user.
The only protest I have received so far was a medical supply store that said they could not accept a "stamped" date. We notified them it was typed, not stamped, and they were happy.
In June 2010, new federal laws removed further doubt about the validity of electronic records, accepting
both records & signatures.
My practice has been scanning & archiving, and then shredding our paper records since 2007, and we have not yet had a challenge from an insurer, government agency or attorney when we provided scanned records.