How important is it to have the original promissory note?

[Julian Buick]

I just made a loan that was secured by a deed of trust and promissory note. I got the original deed of trust back after it was recorded. I asked for the original of the promissory note and was told that I already have the original. It was emailed to me. The note was signed using authentisign. Anyone ever heard of that? Is it legit?