The police complaint and newspaper advt are basic usual requirements to get certified copies.
Visit O/o Registering Authority or any other offic that issues certified copies and inquire in person.
Inquire in person from concerned office...
and or
if the matter is too serious and you are gathering evidences puruse the RTI route.......
You can obtain certified copies from sub-registrar office of Revenue.
A letter written requesting the copy needs to be submitted, along with the relevant Application Form 22.
* The application Form 22 needs to be filled with all the relevant details. The form itself can be downloaded from the department's website or alternately can be got from the sub-registrar’s office.
Usually it is displayed in O/o Authority and even on websites.....