Land

Dear Sir, Just protest their claim and if they file any case then you must say that you have perfected such encroached portion by way of adverse possession as they have admitted the same by raising a compound wall. In the worst situation you may agree to pay nominal compensation to avoid demolition etc.

I am sorry to hear that but in this case you can try to talk to the amicably in case they does not respond to that then you can go head and serve them a legal notice and after that we had and final case against them

Yes