"Public notice Duration"

Your querry is not clear.  However, the following information is given :-

(1)  When an individual loses his property's mother documents,  to safeguard against any misuse, he has to lodge a police complaint as well as publish in Newspapers.  Based on such advertisement, if someone tries to create some false charge/misuse it will lead to his criminal prosecution.   Once an individual publishes his 'lost documents' in the newspapers, it is advisable to prepare an affidavit (duly signed by notary public) and retain it for future.

(2)  Based on the police complaint and newspaper advt, the future buyer, has to publish an advertisement in the newspaper stating these occurrences and to seek claims (if any) within 15 days of publication of the public notice (failing which it shall be presumed that there are no charges against the said documents).   

Sagar,

Agreeing with what Mr. Sivasubramanian has said, I would like to add that it is better to intimate the District Sub-Registrar, within whose jurisdiction the property is situated, about the loss of the documents so as to prevent any person from making unauthorised transfer of property to third persons by impersonation.

I agree with the view given by Sri Subramanian . The first precaution is to inform the Local police station and give a Public Notice so that we can defend for any charge created fictiously by some person subsequent to the said Notifcation .