I had recently posted elsewhere why I believe that in most cases, original notes do not exist, having been destroyed after scanning by the closing agents.
Here's Fannie Mae's description of the process:
The originals are converted to e-notes. The e-notes are then sold and delivered to Fannie. Apparently, Fannie uses sophisticated technologies to be able to produce what would appear to the naked eye to be the original note. So when you are presented with what appears to be "an original note retrieved from a custodial vault," chances are that it is not.
One really needs to have a forensic analysis performed on the note, to include "yellow dots analysis" and a search for your fingerprints on the note.