What entity are you resolving?
A postcode, premises, legal company, charity, person or authority to act each needs a different source and identifier.
UK implementation guides
UK company data and identity
A registry result, postcode match or identity signal is evidence—not the whole decision. These guides show UK product teams how to resolve the right record, preserve provenance and keep human confirmation where the source cannot answer the business question.
- 2
- published guides
- UK
- market-specific
- source
- linked at each claim
- 2015
- shipping since
Decision overview
Start with the business decision.
Practical guidance for UK company, charity, postcode and identity data: what each source proves, what it does not, and how to integrate it safely.
What can the source prove?
Separate existence and public-record facts from identity, ownership, eligibility, deliverability and risk decisions.
What becomes your stable key?
Prefer durable identifiers such as a company number or UPRN where available; keep display text and user-confirmed data separate.
How does change arrive?
Define refresh, conflict, retention and review rules before a scheduled sync is allowed to overwrite a business record.
Working principles
Controls that travel between projects.
- 01Resolve candidates before treating any result as confirmed.
- 02Store source, retrieval time and user confirmation separately.
- 03Design an explicit unavailable, ambiguous and manual-review path.
- 04Collect only the fields the product decision actually needs.
Published guidance
Implementation detail, with the boundary shown.
Each guide states what the cited source supports, what still needs product or professional judgement, and how the integration fails in practice.
Address data
Postcodes.io vs Ideal Postcodes for UK address lookup
Choose postcode geography or complete delivery-point addresses with a practical scoring model and Next.js integration pattern.
Read the guide →Company dataUsing the Companies House API for UK onboarding and KYC
Resolve the legal entity, understand the KYC boundary and synchronise registry data without damaging customer-confirmed records.
Read the guide →These pages provide technical and operational guidance, not legal, tax, financial or compliance advice. Confirm regulated decisions with an appropriately qualified UK adviser.
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