Section 950. Satisfaction of undertaking of collecting officer

Upon the
  settlement of the account of taxes of a collecting officer in  any  city
  or town, the county treasurer shall, if requested, and if the collecting
  officer has fully paid over or duly accounted for all the taxes which he
  was  by  law  to  collect, give to such collecting officer or any of his
  sureties a written certificate of such  settlement,  duly  acknowledged.
  Upon the filing thereof in the office of the clerk where the undertaking
  is recorded, the clerk shall enter satisfaction of such undertaking. The
  filing  of  the satisfaction shall discharge the lien of the undertaking
  upon the real property of the collecting officer and his  sureties,  but
  in  no  way shall impair the liability of the collecting officer and his
  sureties upon  the  undertaking  for  a  failure  on  the  part  of  the
  collecting officer to pay over moneys collected by him.