Section 34A(3) in The Goa Panchayat and Zilla Panchayat (Election Procedure) Rules, 1996
(3)Any reference in this rule to the left forefinger of a voter shall, in the case where the voter has his left forefinger missing, be construed as a reference to any other finger of his left hand and shall, in the case where all the fingers of his left hand are missing, be construed as a reference to the forefinger or any other finger of his right hand, and shall in the case where all his fingers of both the hands are missing, be construed as reference to such extremity of his left or right arm as he possesses.]