It would be nice if we could create a tech signature to attach to notes sent by a tech.
Isn't this already a feature? Each tech can edit their signature in their tech account settings.
Except the signature is not applied when adding a note - at least not in my experience. All you see is the full ticket and the addition of the note.
Are you sending "Note Only" or "Full Ticket Detail" when you send the note? The former will just send the note that was added (btw this is MUCH more likely to be read in my experience than "full ticket detail"). The latter will send the client the whole shebang.
Make sure that you have "Default Tech Note Email Type" in "Settings" -> "Email" -> "Options" set to "Note Only"
I tested the feature using the "Note Only" checkbox and it sent me the contents of the note with my tech signature concatenated to the end.
-Adam