undeserver

From un- +‎ deserve +‎ -er.

undeserver (plural undeservers)

1. Someone who is not worthy.
   • 1599 (first performance), William Shakespeare, “The Tragedie of Iulius Cæsar”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act IV, scene iii]:

     Let me tell you, Cassius, you yourself
     Are much condemn'd to have an itching palm;
     To sell and mart your offices for gold
     To undeservers.

• undeserving

• “undeserver”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.

• underserve, underverse, unreserved, unreversed