Property dispute

Why did he leave 800 sq feet for road purpose, did he get any compensation towards this land acquisition or that  his land was acquired by a notification?

You may revert with clear details  if you are really seriously looking  to know about proper opinion to your problem. 

Sir he didn't left land he was unaware of fraud activity and while contacting seller he is not giving proper answer now.what legal action can be taken. Thanks in Advance

Let him get his property surveyed by a government surveyor and ascertain the extent of his property as per his sale deed 

If the extent is less than the one mentioned in the sale deed then he should confirm the extent of property as per the chain of documents. 

If it is found that the extent now in his possession is less than the extent mentioned in the sale deed then he has to find out the reasons for deficiency in the extent. 

If some portion of his property was acquired by government for road then whether it was before his purchase or after that?

There are lot of doubts to be clarified hence you better consult a lawyer and get the opinion in person. 

Land is not acquired by Government rather the seller has left it as common road as people having land backside of his house don't have any other road for coming out. Can he send legal notice to resolve the issue for 800sqft or pay for 800 sqft.Is it the case of fraud done by the seller

What have you been doing during elapsed period of 5 years as 800 sq ft is a huge area deficit out of 3000 sq ft, if  facts posted are true / believed ?

Get the land measured and ask the vendor for its answer.

Thank you for your reply sir

Seller is not giving any proper response so can we take any legal action against him