Data Provenance, Attribution & Appropriate Use Policy
Transparency and data integrity are central to FastAddress UK. This document explains how our 21.1+ million address database is collated, our open data licensing and Crown copyright attributions, and our guidance on recommended vs. non-recommended use cases.
1. How Our Address Dataset is Built
FastAddress UK combines, cleans, deduplicates, and normalizes high-quality public sector data sources across the United Kingdom. Our data pipeline aggregates:
OS Open Identifiers, OS Open Names, and national geographic coordinate grids providing authoritative WGS84 GPS latitude and longitude mappings.
The official 12-digit Unique Property Reference Number (UPRN) identifier linking physical structures to the UK National Address Gazetteer.
Domestic and non-domestic building registers maintained by the Department for Levelling Up, Housing and Communities (DLUHC).
Definitive title and residential transaction records for properties across England and Wales.
2. Statutory Copyright & Open Data Attributions
In accordance with the Open Government Licence (OGL v3.0) and public sector data re-use terms, the following statutory copyright and database rights apply:
- Contains Ordnance Survey OpenData © Crown copyright and database right.
- Contains Energy Performance Certificate (EPC) public data © Department for Levelling Up, Housing and Communities.
- Contains National Statistics data © Crown copyright and database right.
- Contains public sector information licensed under the Open Government Licence v3.0 (OGL).
- Contains data from HM Land Registry © Crown copyright 2026.
3. Appropriate Use Guidelines
Because FastAddress UK is compiled from open public datasets rather than a direct, proprietary Royal Mail PAF® (Postcode Address File) subscription, certain applications are strongly recommended while others are not advised:
Recommended Use Cases
- E-Commerce Checkout Autocomplete: Eliminating typos and accelerating user checkout on Shopify, WooCommerce, and custom web apps.
- SaaS & Web App Signup: Autofilling billing addresses and postal codes in under 15ms.
- CRM & Contact Form Enrichment: Standardizing customer addresses and automatically appending OS UPRN identifiers.
- Logistics & Map Geocoding: Visualizing property locations using accurate WGS84 GPS coordinates.
- Property Tech & Analytics: Cross-referencing property data using UPRN keys across public datasets.
Not Recommended / Disclaimed
- Emergency 999 / 112 Dispatch: Critical life-safety emergency dispatch systems requiring dedicated PSAP feeds.
- Statutory Legal Process Service: Official court process service where statutory civil procedure mandates a certified PAF extract.
- Bulk Royal Mail Mailsort Discounts: High-volume commercial mail sorting requiring official PAF Mailsort licensing.
- Regulated KYC Banking Verification: Strict banking compliance mandates where regulators explicitly require an active PAF direct audit trail.
4. Address Corrections & Continuous Updates
New properties, commercial redevelopments, and postcode boundary revisions occur constantly. If you identify a missing new build, an incorrect postal code, or a typo, you can submit a correction to our indexing pipeline:
5. Warranty & Liability Disclaimer
FastAddress UK is provided on an "AS IS" and "AS AVAILABLE" basis without warranties of any kind, either express or implied, including but not limited to the implied warranties of merchantability, fitness for a particular purpose, or non-infringement. AHM Labs and FastAddress UK shall not be liable for any indirect, incidental, special, consequential, or punitive damages arising from the use of or inability to use this API service.