If there is a co-owner, it is a good idea to include the co-owner in any decision regarding the property and a transfer of your interest. Depending on how the property is co-owned, different laws will apply to how your interest can be transferred. An attorney or real estate professional should be consulted to make sure any transfer is done properly. If the co-owner is not at risk for deportation, you may consider transferring your entire interest in the property to such co-owner or otherwise giving the co-owner a right (by limited power of attorney) to act on your behalf with respect to the property and any related loans.
