A warranty deed guarantees that a seller owns the property free and clear of liens. A special warranty deed is the more limited of the two.In real estate transactions, a trust deed transfers the legal title of a property to a third party until the borrower repays their debt to the lender. A warranty deed, in essence, is a seller's assurance that they hold clear title to a property and have the right to sell it. An Illinois warranty deed form is a type of deed used to transfer real estate with a full warranty of title. Warranty deeds offer the highest level of protection for buyers and there are two types, general and special. Function: A Warranty Deed transfers property ownership with guarantees, ensuring the buyer gets a clear title. A warranty deed is a document used in real estate to certify that a property is owned free and clear. A General Warranty Deed conveys real property in most US states. A General Warranty Deed not only conveys a grantor's interests and title to a property.