QUESTION: Sir John, we left our land twenty years ago. Our house stood by the river. Last week, I visited it and it seems the land at the back of our house increased in area by around 400sqm. It no longer matches our title. Who owns that additional 400sqm?
ANSWER: What happened is called ACCRETION - an addition to land from natural causes as, for example, from gradual action of the ocean or the river waters.
You may go to the municipal hall and request for a CADASTRAL SURVEY of the extra 400sqm that was added to the boundary of your land. Then CONSOLIDATE that 400sqm to your current land and get a new title.