If I want to status match from delta silver to CO, would I open a ff account with CO first? Or do I send them all the info and thy will open the acct for me? For CO, is it better to fax or email for status match?

If I am just getting delta's silver status will CO give me a problem matching status? I will get silver status through the Amex mr deal going on right now. I don't have a history with delta.