Electronically sign form.

Electronically sign form.

Hi guys 
I have a few forms that need to be signed by clients at the moment we are printing and then signing. 
Is it possible for the client once he/she has filled the form on one of our tablets they can digitally sign it? With their finger?? 
Or can I embed this to the form and get it to attach the file to the record ?  http://www.realsignature.com/


Any help would be great :)