More information is necessary. If this was truly a gift , then your ex has no interest in the property. If he retained an interest, then it was no a gift. He may have added your name to the title. That is different. In that case, you need to work something out with him. Alternatively, one of you can go to court to have the property partitioned. In that case, the judge could order one of your to buy out the other or for the property to be sold.
Answered on Jun 24th, 2013 at 10:01 PM