counterfesance

from The Collaborative International Dictionary of English v.0.48

Counterfesance \Coun"ter*fe`sance\ (-f?"zans), n. [OF.
   contrefaisance, fr. contrefaire. See {Counterfeit}, a.]
   The act of forging; forgery. [Obs.] [Written also
   {counterfaisance}.]
   [1913 Webster]