Short Sales

I’m a newbie and still have not called the bank on a shortsale. I need to know if I have to have all of the paperwork typed up and ready to go before I call the bank, so I can fax all of it while I have the loss mitigation department on the phone? Or do you guys just call first and make sure the bank will do the short sale first? I have so many questions and I guess I’m scared. Thank you Donns[u][/u][i][/i]