Register anonymisation is the removal of details that make each member identified or identifiable under UK GDPR Art. 4(1). Once the list is truly anonymous (Recital 26), it falls outside scope. anonym.plus does this on a local device.
When this applies
A members list names every shareholder with their address and holding. It is personal data under Art. 4(1). Make it anonymous before a buyer reviews it.
How anonym.plus handles it
- Open the list in anonym.plus on a local device.
- It spots member names, addresses, and ID numbers.
- Swap each one for a non-reversible label for true anonymity.
- Keep no re-link key if you want it outside scope.
- Save the clean list on your device.
What you need to provide
- The list (XLSX, CSV, PDF, or Companies House export).
- Replace, with the reversible map turned off.
- Optional language setting for cross-border members.
PII entity types detected
| Category | anonym.plus entity type | Example |
|---|---|---|
| Names | PERSON | Mr Hargreaves → [MEMBER] |
| Location | LOCATION | 7 Mill Lane, York → [ADDRESS] |
| Identifiers | NATIONAL_ID | NINO A123456 → [ID] |
| Contact | EMAIL_ADDRESS | hargreaves@mail.co.uk → [EMAIL] |
| Finance | IBAN_CODE | dividend account → [ACCOUNT] |
| Org | ORGANIZATION | nominee fund → [ENTITY] |
Compliance achieved
- Removes data that makes a member identifiable under UK GDPR Art. 4(1).
- True anonymity puts the list beyond UK GDPR by Recital 26.
- On-device work supports UK data residency.
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Limitations & cautions
A holding size can act as a quasi-identifier. A lone 25% stake may point to one member after the name goes. If you keep a reversible map, the list is pseudonymous, not anonymous, and stays in scope.
Frequently asked questions
Anonymous or pseudonymous — what is the difference?
Pseudonymous output keeps a key that can re-link it, so it stays personal data. Anonymous output drops that key for good. Only then does Recital 26 apply.
What makes a member identifiable under Art. 4(1)?
Any detail that singles out a person — a name, an address, an ID, or even a unique holding. All such clues must go for true anonymity.
Does it handle cross-border members?
Yes. The tool reads 48 languages, so foreign names and ID formats are caught.