warranter

One who warrants.

One who warrants, gives authority, or legally empowers.

One who assures, or covenants to assure; one who contracts to secure another in a right, or to make good any defect of title or quality; one who gives a warranty; a guarantor.

One who warrants, gives authority, or legally empowers.

One who gives a warranty or guarantee.

one who provides a warrant or guarantee to another