He must have some unusual motivation for such a move. If you are aware, and don't have a problem with it, he certainly can sign his rights to the home away. But, some states have rules about changing assets within a certain tme period before filing, as does the IRS if it involves getting assets out of one's name before getting screwed...ummm, I mean audited/assessed for taxes due. And, if you are filing jointly you need to be careful...if that is the motivation.