Yes, a lien is legal if the property is being used to secure a debt. But don't panic yet. No one can file a lien on any property without proof that you agreed to the process.It sounds as if the family mrmber intended that you repay him/her for the property purchase.There would have to be a loan document where you agreed to use the property as collateral. That document would be filed with the lien as proof of the debt.The terms of the loan document will determine what action can be taken against you. The family member may have to go through a foreclosure process, which involves getting a court order instructing you to pay or leave.The first thing to do is check with your County Recorder's office to determine if a lien has actually been filed, or if your family member is making this up. Many Counties now have these records (at least the basics) available online for free. If not, call and ask what is the process for finding out. You'll probably need the parcel number of the property, so have that ready.If there is a lien, you need to check ALL the documents you signed when the property was put into your name. Somewhere in there, you agreed to the family member having the right to lien the property. See what that document says.Contact the Recorder's Office if you can't find the appropriate document - it had to be filed with the lien. It will cost you a few dollars to get copies, but is well worth the money.Then get a lawyer to deal wirh this. Again, it will be well worth the money to protect your property.