Data attributions
This page collects the credits and licence notices for the third-party open-source and open-data components used in parts of the Acuris website and demo tools.
Royal Mail PAF® (UK addresses)
Acuris's UK address validation, UK postcode lookup and related UK services are built using the Royal Mail Postcode Address File (PAF®) under licence. Acuris GmbH is a licensed Royal Mail PAF® Solutions Provider.
Contains PAF® data. © Royal Mail copyright and database right 2026.
PAF® and Royal Mail are registered trademarks of Royal Mail Group Ltd.
Use of UK address data returned by Acuris is subject to the Royal Mail PAF® End User Terms. Further licence information is published by Royal Mail at poweredbypaf.com.
Ordnance Survey (UK UPRN)
Where Acuris returns a UPRN (Unique Property Reference Number) for UK addresses, that identifier is derived from OS Open UPRN, published by Ordnance Survey under the Open Government Licence v3.0.
Contains OS data © Crown copyright and database right 2026.
OpenStreetMap
The interactive map previews shown on Acuris demo dashboards (e.g. the validation and geocoding test forms) render their street base-map tiles from the OpenStreetMap tile network. Map data © OpenStreetMap contributors, available under the Open Database License (ODbL).
Esri World Imagery (satellite base map)
When the demo map previews are switched to satellite view, the aerial / satellite base-map tiles are rendered from Esri World Imagery. Tiles © Esri — Source: Esri, Maxar, Earthstar Geographics, USGS, AeroGRID, IGN, USDA FSA, Microsoft, and the GIS User Community.
Licence summary
- Royal Mail PAF® (UK addresses) — licensed Solutions Provider use; subject to the Royal Mail PAF® End User Terms.
- OS Open UPRN (UK UPRN identifiers) — Open Government Licence v3.0. Full text: nationalarchives.gov.uk/doc/open-government-licence/version/3.
- OpenStreetMap tiles (street base map) — Open Database License v1.0 (ODbL). Full text: opendatacommons.org/licenses/odbl/1-0.
- Esri World Imagery (satellite base map) — © Esri and its data providers (Maxar, Earthstar Geographics, USGS, AeroGRID, IGN, USDA FSA, Microsoft, GIS User Community); used under the Esri terms of use.
Acuris API outputs for most countries (validated addresses, coordinates) are produced from Acuris's own reference database and do not carry a third-party attribution requirement. The exceptions are noted above: UK results incorporate Royal Mail PAF® and Ordnance Survey data and carry the acknowledgements shown, and the rendered base-map tiles on demo pages carry the OpenStreetMap (street) and Esri World Imagery (satellite) attributions. Questions: support@acuris-geo.com.