How and where to pay stamp duty?

Stamp duty can be paid through

a) Purchase of impressed stamps from treasury or licensed stamp vendors or

b) Purchase of adhesive stamps or

c) Payment to the Government through DD/pay order issued by any nationalized bank / scheduled bank or challan.or

d) Instrument (document) can be written on plain paper and stamp duty can be paid through DD/pay order issued by any nationalized bank / scheduled bank or challan within two months from the date of execution of the instrument (document) and get it Certified by the jurisdictional District Registrar or Sub Registrar.