53 Pa. Stat. § 7191
Whenever security is required to be given in accordance with the provisions of this act, it may be approved by the prothonotary, subject to an appeal to the court as in other cases. If thereafter the security by found to be insufficient, new security may be required within a given time, in default of the entry of which the cause may proceed with the same effect as if none had been given, the sureties, however, remaining liable. By agreement of the parties, or upon approval by the court after notice, new security may be entered in lieu of that originally taken, and an exonerator entered on the first bond, or the security given may be limited to a particular property if clear of incumbrances, and, if also, the security by entered as a lien upon said property.
53 P.S. § 7191