So, I'm sitting at the airport and get a call that my signature is needed. I go to the App Store on my iPad and find several free Apps which will allow me to put my signature on a document [there are paid apps, but for now a quick, free test was enough]. The two I liked best are: SignEasy and SIGNificant. There are others, including one for the iPhone. But both of the two named allow me to import an attachment from an email, open and sign and email it on. My signature using my finger wasn't very good, really, which might indicate I should have a stylus when traveling. But for now, this worked just fine.