Clean addresses. Maximise Gift Aid.
AI-powered address validation for the UK charity sector. Fix dirty data from fundraising platforms and unlock every Gift Aid opportunity.
File upload
Drop in CSV or Excel file exports from any fundraising platform for instant batch address cleaning.
Real-time validation
Validate addresses the moment a donor submits a form — stop bad data entering your CRM at source.
CRM integrations
Native two-way sync with Beacon CRM, Salesforce NPSP, Raiser's Edge NXT, Donorfy and more.
AI adjudication
Our hybrid pipeline pairs deterministic Royal Mail PAF matching with LLM intelligence specifically trained for the addresses validation.
Stop losing Gift Aid to bad addresses
HMRC rejects Gift Aid claims when a donor's address can't be matched to electoral roll records. Every rejected claim costs your charity 25p for every £1 donated. Postie validates every address against the Royal Mail PAF database — so your claims go through first time, every time, without your team lifting a finger.
Fundraising platforms send dirty data. Your CRM pays the price.
Platforms like JustGiving, Enthuse, and Facebook Fundraisers collect address data from donors in freeform text fields. Abbreviations, missing postcodes, transposed numbers, and misspelled streets are common. When this data lands in your CRM it creates duplicate records, failed Gift Aid submissions, undelivered direct mail, and wasted staff time manually fixing records one by one.
Postie intercepts this data — in real time or in bulk — and returns clean, Royal Mail PAF-validated addresses you can trust.
How it works
Connect your data source
Upload a file, connect your fundraising platform webhook, or integrate via API.
Postie cleans and validates
Our AI pipeline matches against PAF, corrects errors, and flags unresolvable records.
Receive clean data back
Validated addresses sync directly to your CRM or download as a corrected file.
Works with your fundraising and CRM stack
Be first to access Postie
We're onboarding a small group of UK charities for our private beta. Join the list and we'll reach out when your spot is ready.