---
title: "dunnhumby: what refusing costs you"
url: "https://isitsellingme.com/entity/dunnhumby/"
grade: "Unrated"
category: "CDPs"
last_checked: "2026-09-21"
---

# dunnhumby

**Unrated.** No grade was applied: the document is silent on what refusing costs you, and silence isn't an F.

CDPs · UK

## The clause

> A list of those third parties who may be granted access to your information are as set out below, along with the reason(s) for such access.

Source: https://www.dunnhumby.com/privacy-notice/, checked 21 September 2026. Archived copy: https://github.com/jgarpotter/isitsellingme-archive/blob/main/captures/adtech/dunnhumby/policy/2026-09-21T124206Z.html

Read in full on 21 September 2026. The notice lists who may be given 
access to your information and why, and it's silent on what refusing 
costs: no route to object to marketing use, no setting, no address for 
the purpose. Unrated for that reason, and dunnhumby is asked.

## The three axes

### What refusing costs you

Finding: Not stated.

### Who receives you

Finding: Named third parties.
Categories: Third party service providers, Marketing partners.

### Whether the refusal covers everything

Finding: The document does not address 6 points about what the refusal covers.
- Not stated: Whether it applies to data already collected
- Not stated: Whether it covers in-store purchases
- Not stated: Whether it covers data bought about you
- Not stated: Whether it covers profiles inferred about you
- Not stated: Whether it binds a device or your account
- Not stated: Whether it expires

## The company's response

Asked on 7 October 2026. No reply.

---

Page: https://isitsellingme.com/entity/dunnhumby/
How grades work: https://isitsellingme.com/methodology/
Last checked: 21 September 2026