While transferring a house to a child may lead to a Medicaid penalty period, which would make the parent ineligible for Medicaid for a period of time, there is an exception for transfers to a "caretaker child." This is defined as a child of the applicant who lived in the house for at least two years prior to the applicant's entering a nursing home and who during that period provided care that allowed the applicant to avoid a nursing home stay.
There are many ways to prove that you lived in the house for two years, including:
- Magazine or newspaper subscriptions
- Bills coming to your address for anything, including car insurance, prescriptions, credit cards, etc.
- Your voter registration
- Your car registration
- Any mail you may have received at your new address (of course, everyone uses email today)
Any of these should do the trick. To establish the date, you might show that you filed a change of address form at the post office.
For more information about the caretaker child exception, refer to this article.