No, the property is still yours. However, he can claim an equitable interest (similar to a lien) on the house since he added value by paying a portion of the mortgage principal. He would have an uphill battle though, since you would presumably claim that it was a gift. BTW, this also applies to capital improvements to the home that he pays for (what he contributed that would enhance the value of the home).
Answered on May 18th, 2012 at 1:31 PM