A marketer finds the perfect photo in Google Images, drops it into a blog post with "Image: Pinterest" underneath, quotes three paragraphs from a competitor's study, adds a few affiliate links without a disclosure and describes the client's product as "clinically proven" because the brand said so. Every one of those choices is common. Every one carries legal risk.
Content teams publish faster than ever, increasingly with AI help, and the legal questions have multiplied: who owns AI-generated images, whether crediting a source makes copying acceptable, how close an affiliate disclosure needs to be to the link, and what counts as proof for a marketing claim. Regulators have also become more active — the US Federal Trade Commission on endorsements and reviews, the UK's Competition and Markets Authority on hidden advertising.
This is a plain-English overview of the main areas — copyright, image licensing, quotation and fair use, AI content, disclosures, and advertising claims — based on official guidance from the US Copyright Office, the FTC, Creative Commons and UK regulators. It is a factual guide, not legal advice. Laws differ by country, and for anything high-stakes you should ask a qualified lawyer. What it will give you is a working map and a checklist to catch most problems before you publish.
What copyright covers in marketing content — and what it leaves free
Under US law, copyright exists automatically. The Copyright Office's general FAQ says a work is protected "the moment it is created", and that registration is generally voluntary (though it is needed before suing for infringement of a US work). So the absence of a © symbol tells you nothing: assume any blog post, photo, chart, video or illustration you find online is protected unless its licence says otherwise.
Just as important is what copyright does not protect.
“Copyright does not protect facts, ideas, systems, or methods of operation”
— U.S. Copyright Office, What Does Copyright Protect? (FAQ)
The same FAQ adds that copyright does not protect names, titles, slogans or short phrases. In practice, for marketers:
- Facts and data points are free to use — "62% of respondents said X" — but the way someone expressed or visualised them (their sentences, their chart design) is protected. Restate in your own words and rebuild charts from the underlying data.
- Ideas and formats are free — you can write your own "ultimate guide" on the same topic — but copying the structure and wording closely is not.
- Names and slogans fall outside copyright but may be protected as trade marks, which is a separate area of law. Avoid using competitors' marks in ways that suggest endorsement or confusion.
If someone copies your content, our guide to content theft and DMCA takedowns covers the response.
Using images legally: licences, stock and Creative Commons
Images cause more legal letters to small businesses than anything else in content marketing, usually because someone believed a picture on the internet was free. There are four safe sources, each with conditions.
| Source | What you get | Watch out for |
|---|---|---|
| Your own photos and graphics | Full control | Recognisable people need consent for commercial use; logos and artworks in shot |
| Paid stock licence | Defined rights under the stock site's licence | Editorial-only images, sensitive-use restrictions, print-run or seat limits, model releases |
| Free-licence stock sites | Broad use under the site's own licence | Licence terms differ by site and change over time; keep a copy of the terms at download |
| Creative Commons | Use under the specific CC licence chosen by the creator | Commercial restrictions (NC), no-derivatives (ND), share-alike (SA), attribution requirements |
Reading Creative Commons licences correctly
All six standard CC licences require attribution. The differences are in the extra conditions. According to Creative Commons' licence overview:
| Licence | Commercial use | Adaptations (crop, edit, overlay text) | Share-alike | Safe for a business blog? |
|---|---|---|---|---|
| CC BY | Yes | Yes | No | Yes, with attribution |
| CC BY-SA | Yes | Yes | Yes | Yes, but adaptations must carry the same licence |
| CC BY-ND | Yes | No | No | Only unaltered |
| CC BY-NC | No | Yes | No | Risky — marketing content is usually commercial |
| CC BY-NC-SA | No | Yes | Yes | Risky |
| CC BY-NC-ND | No | No | No | Risky |
Creative Commons defines noncommercial as "not primarily intended for or directed towards commercial advantage or monetary compensation" — a description that rarely fits a company blog. For attribution, Creative Commons recommends the TASL formula: title, author, source and licence, with links where possible.
Two more habits help: save a screenshot of the licence page with the date you downloaded each image, and store licence details in your asset library. Our guide to image licence metadata shows how to record this in the file itself.
Quoting, fair use and why attribution is not permission
The most persistent myth in content marketing is that crediting the source makes copying legal. It does not. Attribution is good practice and often a licence condition, but it is not a substitute for permission or a legal exception.
In the US, the relevant exception is fair use. The Copyright Office's fair use overview lists four factors that courts weigh together, case by case:
- Purpose and character of the use, including whether it is commercial and whether it is transformative — adding new meaning or serving a different purpose.
- Nature of the copyrighted work — using factual works is more likely to be fair than using highly creative ones, and using unpublished works is less likely to be fair.
- Amount and substantiality — how much is taken, and whether it is the "heart" of the work.
- Effect on the market — whether the use substitutes for the original or harms its potential market.
“Additionally, “transformative” uses are more likely to be considered fair.”
— U.S. Copyright Office, More Information on Fair Use
The Copyright Office also notes there is no formula: no safe number of words or percentage of a work. For marketers, the practical translation is:
- Quote short passages to comment on, critique or support your own argument — not to fill space.
- Quote the minimum that makes the point; one or two sentences, not paragraphs.
- Do not reproduce a full chart, infographic or photo just because you are "discussing" it. Link to it, describe it, or rebuild the chart from the underlying data with credit.
- Treat commercial content as starting at a disadvantage on the first factor, and add real commentary.
Other countries use different tests. The UK, for example, has narrower "fair dealing" exceptions for purposes such as quotation, criticism and review, with a sufficient-acknowledgement requirement. If you publish for several markets, the strictest regime should guide your house rules.
AI-generated text and images: who owns them
AI tools raise two separate questions: whether the output can be protected as yours, and whether it infringes someone else's work.
On the first, the US Copyright Office published its report on copyrightability in January 2025. Its announcement said existing copyright principles are flexible enough to apply to AI, and that human creativity expressed through AI tools is still protected — but that outputs qualify only where a human has contributed enough expressive content, and that prompts alone are not enough. In Thaler v. Perlmutter, the D.C. Circuit in March 2025 upheld the Office's refusal to register an AI-generated image that named no human author; the government's January 2026 brief asked the Supreme Court to decline review.
What this means in practice:
- Purely AI-generated images and text may not be protectable by you in the US — competitors could reuse them.
- Human editing, selection and arrangement can be protected; keep records of the human contribution for important assets.
- Infringement risk does not disappear: an AI image that closely resembles a known character, logo or photograph can still cause problems. Check outputs for recognisable third-party material.
- Check your tool's terms for commercial use rights and any indemnities.
Our guide to AI images in marketing covers the quality side.
Disclosure rules for sponsored, affiliate and influencer content
If you, your writers or creators have a material connection to a brand — payment, free products, commission, employment or family ties — readers need to know. The FTC's Disclosures 101 for social media influencers summarises the expectations:
- Place the disclosure with the endorsement, where people cannot miss it — not only in a bio, at the end of a post or behind a "more" link.
- Use plain words such as "ad", "sponsored" or "[Brand] gave me this product". Vague labels such as "sp", "spon", "collab", "thanks" or "ambassador" are not enough.
- In video, put the disclosure in the video itself, ideally in both audio and on screen; repeat it during live streams.
- Do not rely only on a platform's built-in disclosure tool.
“Make disclosures even if you think your evaluations are unbiased.”
— Federal Trade Commission, Disclosures 101 for Social Media Influencers
Affiliate links on blogs
The FTC's Endorsement Guides Q&A addresses affiliate links directly. It says a bare "affiliate link" label may not be understood by readers, while "paid link" placed right next to the link should be adequate. It also warns that disclosures at the top of a page can be missed and that footer disclosures are weak because many readers never scroll that far — the closer the disclosure is to the recommendation, the better. Our guide to affiliate marketing covers programme set-up.
In the UK, the CMA's principles for social media platforms state plainly that "Hidden advertising is harmful and illegal", and its guidance has been updated as recently as August 2025. For creator partnerships, see our influencer marketing guide.
Advertising claims and substantiation: proof before you publish
Content marketing is advertising when it promotes your products or services, and the same truth-in-advertising rules apply to a blog post as to a banner ad. The FTC's Advertising FAQs for small business sets out the core principle.
“The law requires that advertisers have proof before the ad runs.”
— Federal Trade Commission, Advertising FAQ's: A Guide for Small Business
Key points from that guidance:
- Both express and implied claims need support. A photo of a runner next to a supplement implies a performance claim even if the text does not state one.
- The evidence must fit the claim. Health and safety claims generally need competent and reliable scientific evidence; customer testimonials alone usually will not do.
- Disclaimers cannot fix a misleading headline. Qualifying information must be clear and conspicuous, close to the claim, and must not contradict it.
- Comparative claims are legal if truthful — and you need proof of the comparison.
Subjective opinions ("we think it's the nicest café in town") attract less scrutiny than objective claims ("the fastest broadband in Leeds"), which need data. Regulated sectors — health, finance, legal — have extra rules; see our guide to content for regulated industries. The same applies to claims in short-form places such as Business Profile product descriptions.
Testimonials and reviews inside your content
Quoting customers in case studies, landing pages and videos brings in another layer of rules. In the US the FTC's Consumer Review Rule bans fake testimonials and undisclosed insider endorsements; in the UK, concealed incentivised reviews and misleading presentation of reviews are banned practices. Keep the original source and permission for every testimonial, disclose any incentive or relationship, and do not present cherry-picked quotes as typical results. Our fake review rules overview explains each regime.
Worked scenario: running one blog post through legal review
Hypothetical example for illustration. A content team at a home-fitness brand drafts "The 10 best home rowing machines". Before publication, the editor runs it through the checklist below and finds:
- Images: 7 of 10 product images were copied from retailer sites. Fix: use manufacturer press-kit images under their stated terms, or the team's own photos.
- Chart: a heart-rate chart screenshotted from a research paper. Fix: rebuild it from the paper's published figures with a citation, and check the data's own licence.
- Quotes: four paragraphs lifted from a competitor's review. Fix: cut to one sentence with commentary, or remove.
- Affiliate links: 10 links, with a disclosure in the footer only. Fix: add "Paid link" next to each link and a short disclosure above the first recommendation.
- Claims: "Burns 1,000 calories an hour" for the brand's own machine. Fix: remove, or substantiate with a cited study and qualify the conditions.
- AI image: a header image generated in an AI tool showing a recognisable gym chain's logo on the wall. Fix: regenerate without third-party marks.
The review took about 40 minutes and removed six issues, any one of which could have produced a takedown request, a regulator inquiry or an awkward letter.
A one-page legal review checklist for content teams
| Area | Check before publishing | Owner |
|---|---|---|
| Images and video | Every asset has a recorded source and licence; CC terms allow commercial use and any edits; releases for recognisable people | Designer / editor |
| Quotes | Short, necessary, with commentary; source linked; no full charts or photos reproduced without permission | Writer |
| Data | Facts restated in own words; charts rebuilt from data; data licence checked and credited; see public data sources | Writer / analyst |
| AI content | Human review and edits recorded; outputs checked for third-party marks and likenesses; tool terms allow commercial use | Editor |
| Disclosures | Affiliate, sponsored and gifted relationships disclosed next to the relevant content | Editor |
| Claims | Objective claims have evidence on file before publication; qualifiers sit next to claims | Editor / subject expert |
| Testimonials | Genuine, with permission, incentives disclosed, not presented as typical if they are not | Marketing lead |
| Escalation | Health, finance, legal or comparative claims go to a qualified reviewer | Marketing lead |
Put this table in your editorial style guide and make it a gate in your content creation process. For the accuracy side, see our guide to fact-checking content.
Questions marketers ask about content law
Can I use an image if I credit the photographer?
Not unless you have permission or a licence that allows it, or a legal exception such as fair use applies. Credit is good practice and often a licence condition, but it does not replace permission.
Is it fair use to quote another blog in my article?
It can be, if you quote briefly to comment on or support your own analysis. Courts weigh four factors case by case and there is no safe word count, so quote the minimum and add real commentary.
Can I copyright AI-generated images?
In the US, the Copyright Office says purely AI-generated material is not protected and prompts alone are not enough; human creative contributions, such as substantial editing or arrangement, can be.
Where should an affiliate disclosure go?
As close as possible to the recommendation or link. The FTC says a "paid link" label next to an affiliate link should be adequate, and that top-of-page and footer disclosures are easy to miss.
Do I need proof for claims in a blog post?
Yes, if the post promotes your products or services. The FTC requires advertisers to have a reasonable basis for objective claims before publishing, and health claims generally need competent and reliable scientific evidence.
Building legal checks into your content workflow
Legal review does not need to slow publishing. Most issues are caught by three habits: recording the source and licence of every asset at the moment you download it, keeping evidence for every factual or comparative claim in the brief, and placing disclosures next to the content they qualify. Add the checklist above as the last step before scheduling, and escalate anything in a regulated area to a qualified reviewer.
If you would like content produced with these checks built in — original images, properly cited data, compliant disclosures — our content writing service works this way by default. Get a quote to discuss your content plan.
Further reading on content marketing law
- Free Public Data Sources for Data-Driven Content
- Gated vs Ungated Content: When to Put Content Behind a Form
- Content Curation: Share Others' Work and Still Build Authority
Sources for this content marketing law overview
- What Does Copyright Protect? (FAQ) — U.S. Copyright Office
- Copyright in General (FAQ) — U.S. Copyright Office
- More Information on Fair Use — U.S. Copyright Office
- NewsNet Issue 1060: Copyright and AI, Part 2 — U.S. Copyright Office (January 2025)
- Thaler v. Perlmutter, brief in opposition — U.S. Copyright Office (January 2026)
- About CC Licenses — Creative Commons
- Recommended practices for attribution — Creative Commons
- Disclosures 101 for Social Media Influencers — FTC
- FTC's Endorsement Guides: What People Are Asking — FTC
- Advertising FAQ's: A Guide for Small Business — FTC
- Hidden ads: principles for social media platforms — CMA, GOV.UK
