A quitclaim deed is a legal document that transfers whatever interest you own in a property without making any guarantees about the title. In simple terms: it says "I transfer my rights to this property to you, but I'm not promising the title is clear or free from problems." It's one of the simplest and fastest ways to transfer property, but it offers the least protection to whoever receives it.
The keyword is "quitclaim," which means you're giving up or releasing any claim you have to the property. You're not warranting (guaranteeing) that you actually own it outright or that there are no liens, mortgages, or other issues attached to it. The person receiving the property takes whatever ownership interest you have, whatever that may be.