A warranty deed or quit claim deed TRANSFERS TITLE or OWNERSHIP of real property. A general warranty deed is a deed used to legally transfer real property from one person to another.This type of deed offers the most protection for the buyer. What is a Warranty Deed? A Warranty Deed is commonly used to transfer interest in a property or land to a new owner in exchange for an agreed upon sale price. A warranty deed is a real estate document that guarantees that a property is free and clear of liens, mortgages, and other claims. The Cook County Clerk's Office has assumed all operations and duties of the Cook County Recorder of Deeds Office and that office no longer exists. A warranty deed is a real estate document that ensures that the property has a clear title and the seller has no outstanding liens or mortgages. A quitclaim deed, on the other hand, makes no promises about the quality of the title to the property. A special or limited warranty authorizes the grantor to be responsible if the individual does anything to ruin the title.