Payment of stamp duty through MCA21 system is OPTIONAL till 31.03.2010. User may pay stamp duty either through MCA21 system or in the same manner as was prevailing till now. But w.e.f. 1st April, 2010, stamp duty shall have to be paid only through electronic mode for the states which have agreed for e-stamping. Please refer notification SO S.O. 3314 (E) issued by Ministry of Corporate Affairs in this regard.