Section 2420. Reducing bond on payment

Whenever the sureties of the marshal
  shall  pay  the  amount  for  which  the action on the marshal's bond is
  brought, and the costs and disbursements incurred therein, or  any  part
  thereof,  they shall be entitled to have such sum credited upon the bond
  upon presenting to the county clerk the affidavit of  the  plaintiff  or
  his  attorney  in such action, acknowledging the payment; whereupon said
  clerk shall endorse the payment on  the  bond  and  the  bond  shall  be
  reduced by the amount so paid.