The most comprehensive address database available in the country is the postal address database, which is owned by GeoDirectory, a subsidiary company of An Post and Ordnance Survey Ireland. Eircode uses the addresses from this database in the Eircode finder and used the postal address to ensure delivery of the Eircode letter. Eircode does not have the right to change postal address data on behalf of GeoDirectory. It is important to note that as there is no official form of address for properties, the introduction of Eircodes has imposed no obligation to change the address normally used. The Eircode can simply be added to the address normally used for the property.