Double registration of same plot

You can file a complaint, but it is of no use.  It is a civil nature case, so you will have to get declare yourself as the owner of the property by filing suit for declaration and injunction against the person who  has got regd., the sale deed recently

I think u should go for a civil suit and lodge a FIR for fraud against the seller.

Thank you so much for your kind suggestion. 

File a complain against both the parties as well as file case before court to protect you rights

none can sell the a single property twice to separate party, it is criminal offence.

none can sell the a single property twice to separate party, it is criminal offence. also you can file writ before high court making a party to registrar

First file a complaint against your seller and new purchaser as accused.  This is a criminal offence of fraaud, criminal conspiracy, cheating etc.

file crimnal complain case against the person who cheated you, and take injection order

https://www.tnreginet.net/circular/public_Circulars/Fraudulent_Registration.pdf

please check out this circular if this can help, since similar case has happened recently:

Please file a suit for seting aside of the second sale deed. Registration of first sale deed is a clear notice to any person buying the same property

This is very common in Karnataka.

I have heard and come across many such cases.

My argument is "what is the use of registration of a property in the Registrar office by paying all the fees, completing all official formalities in front of an authority (Registrar), then the same property is being registred to multiple buyers?"

Can't it be given an unique number to registered property and if duplicatioin happens should be immediately stopped at the registrar office itself?

Your expert comments please, thanks