Guidance

How to check someone's identity (1. 0)

This guidance, also known as Good Practice Guide (GPG) 45, helps you decide how to check, or ask others to check, the identity of those you interact with.

Documents

Details

This guidance, also known as Good Practice Guide (GPG) 45, helps you decide how to check, or ask others to check, the identity of those you interact with, such as your customers or employees. It describes a methodology for creating digital identities.

This is the pre-release of the 1.0 publication of GPG 45. It coincides with the publication of the pre-release of the 1.0 UK digital verification services trust framework. It has been published for business readiness purposes.

Once Conformity Assessment Bodies (CABs) have been accredited to certify services against the 1.0 trust framework publication and certifications can proceed against it, this guidance will be republished and clearly labelled as the final publication.

Services demonstrating compliance with GPG 45 as part of certification against the 1.0 trust framework will have to comply with this version of GPG 45.

This is the first version-controlled publication of GPG 45. The most recent non-numbered version of GPG 45 (titled ‘How to prove and verify someone’s identity’) can be found on GOV.UK and is, from the date of this publication, considered the 0.4 version of GPG 45.

Updates to this page

Published 3 March 2026

Sign up for emails or print this page