With the proliferation of hand-held credit or debit card payment devices popping up in retail establishments, signing with your finger has become the new norm. But few can master a genuine signature with a fingertip on such a tiny screen. Are these squiggly, and often illegible, digital signatures really legally binding?
http://finance.yahoo.com/news/squiggly-finger-signatures-legally-binding-120000929.html;_ylt=A2KJ3CQJ4D1SujkAGgbQtDMD