Consumer property portals republish public land registry data and add their own enrichment. The principal's home is searchable by address, by name, and by approximate value. The portals retain historic listings, so even a property bought years ago and never re-listed has a paper trail that includes original asking price, original photographs of the interior, and the agent who handled the sale.
The republication is hard to undo. The portals operate independently of the registries from which they source. A correction at the registry does not propagate. A request for removal is processed slowly or ignored. The information sits in a commercial service that has no obligation to the property's current owner.
What this means in practice is that a principal's residence (and often their other holdings) is described in publicly searchable products with a level of detail (rooms, layout, original interior, price paid) that they would never have published themselves. The work is partly removal where possible, partly awareness, and partly the discipline of not adding further public material that would compound the exposure.
Knowing the present picture is the first half of any sensible decision about it.