While it's not uncommon to see people ask for autographs, you have to admit that this was cool!

 

You can get Adobe Ideas for FREE here from the Adobe®

 

Yes it can be awkward signing with your finger so get a stylus!

If you're going to be a doing a lot of these, you might want to make an investment in a iPhone stylus to make it easier for your clients to sign. I got one of these and I LOVE IT! Makes it so much easier to sign!