I would never accept a scanned digital signature in a legal document, and neither would anyone else who knew what they were doing. In answer to all those who say anyone could insert a scan of your signature - yes they could. Which is why such a thing is worthless legally. You CAN sign a document digitally, but it is a completely different process and has nothing at all to do with your "signature". Your hand-written signature is valuable because it is a)subtly different every time you write it, and b)difficult to forge.