Analyze a proposed commercial marketing use of third-party copyrighted content to assess the availability of a fair use defense, including cease-and-desist context and internal IP policy compliance.
Scanned 9/11/2026
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npx -y skills add sunyifeisb-art/legalwork --skill research-fair-use-defense-for-proposed-marketing-use-of-third --agent claude-codeInstalls into .claude/skills of the current project.
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---
name: research-fair-use-defense-marketing
task_id: intellectual-property/research-fair-use-defense-for-proposed-marketing-use-of-third
description: Analyze a proposed commercial marketing use of third-party copyrighted content to assess the availability of a fair use defense, including cease-and-desist context and internal IP policy compliance.
activates_for: [planner, solver, checker]
---
# Skill: Research Fair Use Defense for Proposed Marketing Use of Third-Party Content
## 1. Subject-matter triage
- Identify the exact third-party material, the proposed marketing placement, the intended audience, and whether the use is standalone, illustrative, comparative, testimonial, or promotional.
- Separate legal fair use analysis from business-risk analysis and internal policy compliance; do not merge them into one conclusion.
- If the source set includes a rights-holder notice, first confirm what use was challenged, what relief was demanded, and whether the proposed campaign differs from the noticed conduct.
## 2. Failure modes the skill is correcting
- Applying the four fair use factors mechanically without weighting commercial promotion and competitive substitution appropriately.
- Treating transformativeness as satisfied merely because the material is repurposed in a marketing deck, ad, or campaign asset.
- Ignoring the qualitative significance of the taken portion by focusing only on apparent brevity or percentage.
- Failing to assess whether the proposed use may impair the rights holder’s licensing market for promotional or derivative uses.
- Analyzing fair use without separately addressing notice-letter risk, including the practical consequences of continued use after notice.
- Overlooking internal IP policy approval, attribution, clearance, or escalation requirements that may bar use even if fair use is arguable.
- Making conclusory statements without tying each proposition to the governing copyright doctrine, statutory provision, or leading case.
## 3. Legal frameworks / domain conventions that apply
- Fair use is a statutory defense under 17 U.S.C. § 107 and requires analysis of the four factors: purpose and character of the use; nature of the copyrighted work; amount and substantiality used; and effect on the potential market.
- The first factor should address commerciality and transformation together; cases commonly framed by the statute and leading authorities such as Campbell v. Acuff-Rose Music, Inc., 510 U.S. 569 (1994), and related fair use precedent.
- Transformative use asks whether the new use adds a different purpose, meaning, or message, not merely a new container for the original expression.
- Commercial marketing uses are more exposed because advertising, sponsorship, and promotion often exploit the source work’s appeal rather than comment on it.
- The second factor generally favors use of factual, informational, published, or less creative works, and disfavors copying from highly expressive or unpublished works.
- The third factor turns on both quantity and quality; copying the “heart” of a work can weigh against fair use even when the amount appears limited.
- The fourth factor is often decisive in promotional settings: if the use competes with the original, serves as a market substitute, or usurps licensing demand for similar uses, fair use is weaker.
- Notice or demand letters do not by themselves determine infringement, but they materially affect litigation posture, settlement leverage, and risk of enhanced remedies where available.
- Internal IP policy is a separate governance layer; a use may be legally arguable yet still noncompliant with internal review, attribution, approval, or escalation rules.
## 4. Analytical scaffolds
1. Identify the use with precision: quote, image, clip, excerpt, claim, or reference; where it appears; how prominent it is; and whether it is altered.
2. Apply 17 U.S.C. § 107 factor by factor, then synthesize the factors rather than tallying them mechanically.
3. For the first factor, ask whether the use is genuinely transformative or instead primarily promotional, substitutive, or reputation-leveraging.
4. For the second factor, classify the source work’s character: factual/informational versus creative/expressive, published versus unpublished, and discrete element versus integrated expression.
5. For the third factor, evaluate both the amount taken and whether the portion used is the qualitatively significant part of the source.
6. For the fourth factor, assess direct substitution, market harm, and licensing-market harm, including foreseeable demand for licensed advertising or promotional reuse.
7. If a notice or demand letter is present, identify the asserted ownership basis, the allegedly infringing conduct, any deadline, and the practical risk of continuing unchanged.
8. Check internal IP policy separately: clearance steps, required approvals, attribution standards, prohibited uses, and escalation paths.
9. Conclude with a practical recommendation: proceed, modify, or license/seek clearance, with the minimum changes needed to reduce risk.
## 5. Vertical / structural / temporal relationships
- If multiple campaign assets are implicated, analyze each materially different use separately rather than assuming one fair-use result covers all formats.
- If the same source material appears across channels or time periods, distinguish the initial use from later reuse, republication, or evergreen reuse.
- If a notice letter post-dates some uses and predates others, separate pre-notice conduct from post-notice continuation and flag the heightened risk of continued deployment.
- If the campaign depends on coordination with legal, brand, or approvals teams, note the decision sequence and any gating review before launch.
## 6. Output structure conventions
- Write a memo in conventional legal form with a short issue statement, concise facts or assumptions, a fair use analysis organized by the four statutory factors, and a bottom-line risk assessment.
- Include a separate section for notice-letter implications, if any, and a separate section for internal IP policy compliance.
- State the controlling authority for each legal proposition by name and section or citation where available.
- End with a clearly labeled Recommended Actions block using imperative language, naming the responsible role and the timing anchor drawn from the record or the relevant launch milestone.
- Keep the recommendation practical and specific: modify the use, secure a license, obtain approval, or pause launch until clearance is complete.
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