Do I need to put a lien on the property ( a piece of land)

[Joanne Gonzalez]

I am allowing someone to borrow $10,000. And as collateral, they have put up a piece of land that they own. In case they don't pay, I will keep the piece of land. Do I need to put a lien on the property or is a detailed contract in place enough?  I live in North Carolina, but the property is in South Carolina. should I hire an attorney for any part of this transaction?