A warranty deed transfers ownership and explicitly promises the buyer that the transferor has good title to the property, meaning it is free of liens or claims of ownership. The transferor guarantees that he or she will compensate the buyer if that turns out to be wrong. The warranty deed may make other promises as well, to address particular problems with the transaction.

While a general warranty deed is normally used for residential real estate sales and transfers, special warranty deeds are more commonly used in commercial transactions.