The holder of the mortgage instrument, as well as the those that legally stand in his or her place (you), can issue the satisfaction.  However, I would make sure that the Letters Testamentary issued to you allow you to allow same, although I am inclined to think that they do.  Here is a pamphlet to try and help. Good luck.http://gaprobate.gov/sites/default/files/probate/Duties%20of%20PR_8.5x11.pdf