As you don't post more details, I will try to guess the answers:
answered 15 Dec '13, 16:56
If the POI is a node, the best for OSM is to move the existing POI to its new location, therefore we preserve its history. If the POI includes address tags, then update the address. For the previous location, you can create a new node for its new feature (e.g. a new"shop" key + new "name") or if it's not occupied at the moment, a tag "disused:shop=yes". In addition, you could add a tag "note" explaining that the old shop has been moved or a tag "old_name" containing the previous shop name.
answered 16 Dec '13, 10:17