Retail Media and Shopper Data Checklist: Data Ownership and Basis, Supplier and Brand Terms, Measurement and Attribution Claims, Clean Room Arrangements, and Consumer Rights Handling

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A ten-phase working checklist for retailers building media networks, brands buying from them, agencies sitting between, and the vendors supplying the infrastructure. Phases one and two run the inventory and repair the loyalty programme documents that carry the entire structure. Phases three through five build the privacy architecture, the sensitive-category suppression, and the consumer rights machinery. Phases six and seven cover clean rooms and measurement substantiation. Phases eight through ten cover commercial terms, the interception exposure, and protecting what is genuinely proprietary. Each phase closes with a gate.

IP and Technology > Privacy Data Security | Checklist | Published 2 April 2026 - Updated 7 August 2026 | Casey Scott McKay - marksy.us


How to use this checklist

Four parties use this document and each needs a different subset.

A retailer building a network runs all ten phases, with Phase 2 on the critical path because the notice refresh has a lead time nothing else does. A brand buying media runs Phases 1, 6, 7, and 8 from the other side of the table. An agency runs Phases 7 and 8. A technology vendor runs Phases 6 and 10.

The doctrinal background is The Aisle Is an Advertising Network; the operational treatment with worked engagements is Building a Retail Media or Shopper Data Business; the cluster is assembled in the Retail Media and Shopper Data Toolkit.

Start from the position that the shopper data is not property. It is a set of facts, unprotectable under Feist Publications, Inc. v. Rural Telephone Service Co., controlled entirely by contract, technical access, and regulation. Every phase below builds one of those three.


Phase 1. Inventory


Phase 2. Repair the foundation documents


Phase 3. Build the privacy architecture by product


Phase 4. Sensitive-category suppression


Phase 5. Consumer rights machinery


Phase 6. Clean rooms and derived data


Phase 7. Measurement substantiation


Phase 8. Commercial terms

Retailer side

Brand side


Phase 9. Interception and pixel exposure


Phase 10. Protect what is proprietary


Launch readiness

Before an off-site product goes live, all of the following should exist with a named owner.


The annual review


Failures this checklist prevents


Party-specific short forms

The retailer

The brand

The agency

The technology vendor


Three worked applications

The launch six weeks out

A regional chain plans to launch off-site targeting on loyalty data.

The brand disputing reported lift

A manufacturer believes a network's reported sales lift is implausible.

The pixel demand letter

A retailer receives a demand alleging its site's tags intercepted communications.


The adjacent networks

Every business with a customer relationship and a transaction record is building one of these, and the framework transfers with the sensitivity of the data.


What good looks like

Seven statements. The networks that can make all seven will still be operating in this form when the enforcement wave finishes.


A note on proportion



Diligence: buying, selling, or investing in a network

Retail media businesses are acquired, carved out, and taken to investment committees, and the diligence questions are distinctive enough to be worth listing.


Evidence habits worth building



Conversations that recur, and how to answer them



Four questions to open every file with

Four questions, answerable in a fortnight, and between them they describe every way this business goes wrong.


The underlying discipline is the same throughout: in a business built on documents rather than property, the documents are the business, and a document nobody has read since it was drafted is a liability wearing the costume of a control.


That is the whole discipline of this checklist: it converts documents nobody has read into documents somebody owns, on a cycle, with a date.


Everything else in this sector — the technology, the measurement, the commercial negotiation — sits on top of that one habit.


Build the habit first, and the rest becomes ordinary practice rather than crisis management.


Key Authorities at a Glance

The foundation is negative: shopper data is not property. Feist Publications, Inc. v. Rural Telephone Service Co. denies copyright in facts, 17 U.S.C. § 103 leaves compilations thin, and 17 U.S.C. § 102(b) excludes the organising system. Contract, technical control, and trade secrecy under 18 U.S.C. § 1836 and § 1839 substitute for the missing property right.

The privacy layer supplies the binding constraints: sale and share definitions in the state comprehensive statutes, children's obligations at 15 U.S.C. § 6501 and 16 C.F.R. Part 312, marketing channels at 47 U.S.C. § 227 and 15 U.S.C. § 7701, and the eligibility trap at 15 U.S.C. § 1681. Private litigation runs on 18 U.S.C. § 2511 and 18 U.S.C. § 2710, with standing from Spokeo, Inc. v. Robins and TransUnion LLC v. Ramirez, against the backdrop of Sorrell v. IMS Health Inc..

Measurement claims are governed by 15 U.S.C. § 45 and 15 U.S.C. § 1125, with Lexmark International, Inc. v. Static Control Components, Inc. on standing and POM Wonderful LLC v. Coca-Cola Co. closing the compliance defence. Protecting the stack runs through 35 U.S.C. § 101, Alice Corp. v. CLS Bank International, Mayo Collaborative Services v. Prometheus Laboratories, Inc., and 15 U.S.C. § 1052.

| Authority | Phase | | --- | --- | | Feist Publications, Inc. v. Rural Telephone Service Co. | 1, 10 — no property in facts | | 17 U.S.C. § 102(b) | 10 — organising systems excluded | | 17 U.S.C. § 103 | 10 — thin compilation protection | | 18 U.S.C. § 1836 | 10 — trade secret claim for derived assets | | 18 U.S.C. § 1839 | 10 — reasonable measures | | 15 U.S.C. § 45 | 3, 7 — deception, on-site and business-to-business | | 15 U.S.C. § 6501 | 4 — children's data | | 16 C.F.R. Part 312 | 4 — the operative children's rule | | 47 U.S.C. § 227 | 4 — calls and texts | | 15 U.S.C. § 7701 | 4 — commercial email | | 15 U.S.C. § 1681 | 4 — the consumer report trap | | 18 U.S.C. § 2511 | 9 — interception theory | | 18 U.S.C. § 2710 | 9 — video privacy claims | | Spokeo, Inc. v. Robins | 9 — concrete harm | | TransUnion LLC v. Ramirez | 9 — standing limits in data cases | | Sorrell v. IMS Health Inc. | 9 — commercial data and the First Amendment | | 15 U.S.C. § 1125 | 7 — competitor claims on performance | | Lexmark International, Inc. v. Static Control Components, Inc. | 7 — who may sue | | POM Wonderful LLC v. Coca-Cola Co. | 7 — standards compliance is no defence | | 35 U.S.C. § 101 | 10 — eligibility of the technical stack | | Alice Corp. v. CLS Bank International | 10 — abstract idea screen | | Mayo Collaborative Services v. Prometheus Laboratories, Inc. | 10 — the two-step framework | | 15 U.S.C. § 1052 | 10 — registering the network brand | | 17 U.S.C. § 201 | 8 — ownership of campaign creative |

Further reading is collected at retail media data rights, universal opt-out signal, data clean room agreement, pixel wiretap litigation, and incrementality measurement claims.


Related Documents

The doctrine is The Aisle Is an Advertising Network; the operational treatment is Building a Retail Media or Shopper Data Business; the cluster is the Retail Media and Shopper Data Toolkit.

For Phases 2 through 5: The State Privacy Wave, Standing Up a Multi-State Privacy Compliance Program, the State Privacy Law Applicability and Readiness Checklist, the State Privacy Compliance Toolkit, the Marketing Privacy Compliance Checklist, the Privacy and Marketing Data Toolkit, Building a Privacy Compliance Program for a Consumer Brand, Your Face as Data, Building a Biometric Compliance Program, the Biometric Data Checklist, the Biometric and Sensitive Data Toolkit, Building for Someone Who Cannot Consent, Permission to Reach Someone, and the Marketing Communications Toolkit.

For Phases 6 through 8: Selling Something You Cannot Own, the Data Licensing Checklist, the Data Licensing and Rights Toolkit, the Competitive Intelligence Checklist, False Advertising Under the Lanham Act, Bringing and Defending a Lanham Act False Advertising Claim, Two Brands, One Product, the Co-Branding Agreement Checklist, the Channel Partner IP Checklist, Who Owns the Work, and the Agency Engagement Checklist.

For Phase 10: What Can Actually Be Patented and the Trademark Portfolio Management Toolkit.


Marksy is not a law firm and this checklist is not legal advice. Privacy obligations, interception statutes, and advertising standards vary substantially by jurisdiction and change frequently. Consult qualified counsel before launching an off-site targeting product, entering a clean room arrangement, or making a measurement claim.

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