Section 22(1)(b) in Andhra Pradesh Municipal Corporations (Conduct of Election of Members, Election Expenses and Election Petitions) Rules, 2005
(b)shall thereafter cause the left hand fore-finger of the voter to be marked with indelible ink and then deliver a ballot paper. Before delivering the ballot paper to a voter where a direction has been issued in this behalf under rule 19, the polling officer shall stamp the ballot paper and its counterfoil on the back with such mark as may have been specified under that rule; and