If you signed a promissory concerning the loan that you obtained for the mobile home, you need to first ascertain if the mobile home is security for the loan or not. Most likely it is. The next issue is whether or not the mobile home qualifies under your state's anti-deficiency legislation as a home where the lender can pursue you for any deficiency in connection with its sale and the underlying loan.For that, I recommend that you consult with an experienced real estate attorney in your state. If it does fall within your state's anti-deficiency statute with respect to the loan used for its purchase, then you would not be obligated for any deficiency if the registration is returned to the lender on the mobile home.