From The Collaborative International Dictionary of English v.0.48 :
Warrantee \War`ran*tee"\, n. (Law)
The person to whom a warrant or warranty is made.
[1913 Webster]
From WordNet (r) 3.0 (2006) :
warrantee
n 1: a recipient of a warrant issued by a court in the United
States
2: a customer to whom a warrant or guarantee is given
3: a written assurance that some product or service will be
provided or will meet certain specifications [syn:
guarantee, warrant, warrantee, warranty]
From Bouvier's Law Dictionary, Revised 6th Ed (1856) :
WARRANTEE. One to whom a warranty is made. Touchst. 181.