Address verification checks an address against the authoritative Royal Mail Postcode Address File to confirm it exists and can be delivered to. AutoPostcode verifies addresses as they're entered and returns them in a clean, standardised format.
What verification prevents
- Failed deliveries, returns and costly re-ships
- Dirty CRM data and duplicate records
- Manual address correction and support overhead
- Risk in fraud screening and KYC onboarding
Real-time or bulk
Verify addresses live at the point of entry to stop bad data getting in, or validate existing records to clean up a database. Either way, results are backed by official PAF data.
Part of the postcode lookup hub
See the postcode lookup API hub and the closely related address validation API.
Frequently asked questions
What is UK address verification?
Address verification checks that a UK address exists and is deliverable by matching it against the Royal Mail Postcode Address File (PAF). AutoPostcode verifies and standardises addresses at the point of entry.
How does verification reduce costs?
Verified addresses prevent failed deliveries, returns and re-ships, and reduce manual address correction — saving both shipping spend and support time.
Can it help with fraud and KYC?
Confirming an address is real and deliverable is a useful signal in fraud screening and KYC onboarding flows.
Ready to get started?
Add Royal Mail PAF-verified UK address lookup to your site in minutes — start free, no card required.