If its the mortgage company that is the purchaser, they will hire a company to first check to see if the property is occupied, then have a department that will begin the legal steps to have you set out into the street.
This is done with the sheriff's department who hire several men to actually come into you home, and set all the furniture and personal itsems literally out in the street - you want to avoid that at all costs!
I suggest you call the attorney's office that sent you several letters, and ask them who bought the property and if they have a "Cash For Keys" program -if they do, they normally give you 21 days to vacate, and when you give them the keys and they see that the home is pretty much free of damage, they will give you a check.
The last one I did, the cash was $3,800.00!
Good Luck, call me if I can help!
Bill Wootan-Leader of Team One
Century 21 H T Brown Real Estate, Inc.