Section 701. Requisites of letters 1

Letters granted by any court to a fiduciary shall be issued in the
  name  of  the  people of the state, attested in the name of the judge of
  the court, sealed with the seal of the court and signed by the court  or
  the  chief  clerk  of the court or such other officer as the chief clerk
  shall have authorized or deputized for the purpose.
    2.  To all letters of guardianship of the property of an  infant,  the
  court  must  cause  a  copy  of  1719  and 1720 to be annexed or printed
  thereon.
    3.  No court except the court which issues letters shall have power to
  suspend, modify or revoke them, so long as the court  issuing  them  has
  jurisdiction of the estate or matter in which the letters were issued.