Comment by giobox

I've signed and returned almost everything requiring a signature for years this way, you can even have multiple signatures (helpful when you need spouse to sign something too...) in Preview to speed up dealing with these kind of tasks. I've never once been asked to sign it with a pen instead, even for relatively complex transactions like houses/cars.

Because Preview lets you draw the signature using the TrackPad and a finger, I've had no difficulty making a very convincing replica of my actual signature in Preview.

While the linked tool may "look" more convincing with fake photocopy marks etc, for just signatures its not been necessary to go beyond Preview for me ever. In the US so much business is conducted on paperfree platforms like DocuSign etc that I don't think many people even notice the fact the signature is digital anymore, given platforms like DocuSign do more or less the same thing.