FYI, The information I found on this page is out of date. Here is First Horizon's updated info:
First Horizon – Equity Line 800-354-4538
This is the main short sale department you need to give them the borrowers name and they will tell you who the file is assigned to and their contact info.
The negotiator can send you the borrower financial worksheet and 3rd party authorization. They did not accept a generic authorization or worksheet.