Customer-list anonymisation is the removal of buyer PII from a sales record. Where the bidder is a competitor, naming customers with their prices can itself be an agreement or concerted practice caught by the Chapter I prohibition in Competition Act 1998 s.2. anonym.plus keeps the segment and revenue math while the identities go, on your own device.
When this applies
A customer roster names each account with contacts and spend. Advisers normally put such files behind a clean team so the rival's deal staff never see them. An anonymised roster reaches the same result and stays outside UK GDPR under Recital 26.
How anonym.plus handles it
- Load the roster into anonym.plus on your device.
- It finds names, emails, phones, and addresses.
- Segment, spend, and revenue fields stay in place.
- Swap each account for a steady label across joined rows.
- Save the clean file on your device.
What you need to provide
- The roster (XLSX, CSV, or CRM export).
- A column map for known contact fields.
- Replace with the map off for full anonymity.
PII entity types detected
| Category | anonym.plus entity type | Example |
|---|---|---|
| Names | PERSON | customer_name → [CLIENT_n] |
| Contact | EMAIL_ADDRESS | buyer email → [EMAIL] |
| Contact | PHONE_NUMBER | buyer phone → [PHONE] |
| Location | LOCATION | billing address → [ADDRESS] |
| Org | ORGANIZATION | account firm → [ACCOUNT] |
| Identifiers | NATIONAL_ID | VAT id → [ID] |
Compliance achieved
- Cuts customer-level detail that engages Competition Act 1998 s.2 when the bidder competes.
- Backs a clean-team protocol with data that carries no named account.
- True anonymity puts the roster beyond UK GDPR by UK GDPR Recital 26.
- Steady labels keep the segment math while no buyer is named.
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Limitations & cautions
Anonymising is not a competition-law clearance. Aggregate pricing can still be sensitive, and Competition Act 1998 s.2 looks at the effect of the exchange, not the labels on it. A single large account also re-identifies by spend: one buyer at 60% of revenue points to itself after the name goes.
Frequently asked questions
Is the revenue data removed?
No. Segment, spend, and revenue stay. Only names, contacts, and IDs change, so the split is intact.
Does anonymising solve the gun-jumping problem?
It reduces it, but does not remove it. The Chapter I prohibition in Competition Act 1998 s.2 weighs what the exchange does to competition. Keep the clean-team protocol and take competition advice on pricing detail.
Can the buyer market to this list after completion?
Not automatically. PECR 2003 reg. 22 ties electronic marketing to consent or the soft opt-in from the original sale, and those do not simply follow the asset. Check the position before any campaign.