Can I retain possession of my house?

You can seek to re-purchase the home, but unless you can prove fraud on behalf of the mortgage company or the firm handling the foreclosure process, it is highly unlikely you will be able to void the foreclosure sale. When I say, re-purchase the home, I mean through the use of cash or from a third funding course. The original lender is unlikely to enter into another purchase agreement with you at this point.

Once the sale happens, you lose any and all interest in the house. It may be possible to get the sale rescinded if you can show some illegality on the part of the lender or its attorneys. I once was able to buy back the house from the lender but that client had access to the full amount of cash necessary (from a family member).

If your house was sold someone else owns it you can negotiate with them to re-purchase it.