How ASA and CMA rules shape influencer contracts for British agencies

What to take away

• An influencer management agency must write ASA and CMA duties into every creator contract, or the agency carries the enforcement risk.
• The CAP Code requires ads to be obviously identifiable; the CMA treats undisclosed ads as misleading omissions.
• Contracts need disclosure, substantiation, take-down and record-keeping clauses, plus a Copy Advice workflow.
• ASA sanctions include naming and paid search ads; persistent breaches can go to Trading Standards.
• Keep evidence for at least two years and be ready for audit.

How the ASA CAP Code treats influencer marketing as advertising

The ASA regulates ads in the UK through the CAP Code. If a creator is paid, gifted or otherwise controlled by a brand, the content is an ad. The rules on recognition of marketing communications require it to be obvious. A vague tag or a buried mention does not count.

The CAP Code applies to influencer posts on Instagram, TikTok, YouTube, podcasts and blogs. It also covers affiliate links and brand ambassador deals. The ASA publishes the Advertising codes - ASA | CAP that set out these recognition rules.

Agencies often act as the brand's agent. That means the ASA can treat the agency as the advertiser if it controls the brief. The contract must make the disclosure duty explicit, not assumed.

The recognition test is simple: would a reasonable viewer know it is an ad before engaging? If not, the post breaks the code. This is why disclosure must be upfront, not in a hashtag wall.

For agencies, this changes how you apply advertising rules to creator campaigns. Every brief needs a disclosure line and a check before the creator posts.

What counts as an ad under the CAP Code

Payment, free product, discounts, commission, or any editorial control can make content an ad. Even a long-term ambassador deal with no cash can be an ad if the brand approves content.

The recognition rules in practice

The ASA expects labels like #ad to be clear and prominent. The label must be in the first part of the caption or on the image. Platform tools can help, but they are not a substitute for a clear label.

What the CMA expects on disclosure and misleading omissions

The CMA enforces consumer protection law. It treats undisclosed advertising as a misleading omission. If a creator hides a commercial link, the CMA can act against the brand and the agency.

The CMA publishes guidance for businesses on its Competition and Markets Authority - GOV.UK pages. It also has a collection of Consumer protection guidance for businesses - GOV.UK that agencies must reflect in contracts.

The CMA expects disclosure to be clear, timely and not hidden. A label at the end of a long caption may fail. The test is whether the average consumer understands the commercial intent before deciding to engage.

The CMA can seek undertakings or take court action. It can also work with the ASA. For agencies, the contract must require creators to disclose before posting, not after a complaint.

The CMA guidance also covers fake reviews and misleading claims. If a creator says a product cures a condition, that is a claim the brand must substantiate. The agency should pass that duty to the creator in writing.

Undisclosed advertising as a misleading omission

A missing #ad can be a misleading omission under the Consumer Protection from Unfair Trading Regulations 2008. The CMA can treat it as a breach even if no one complains.

Joint responsibility

The brand, the agency and the creator can all be liable. Contracts should allocate duties but cannot remove liability. This is why a clear disclosure policy without the guesswork matters.

Clause-by-clause: writing ASA and CMA duties into creator contracts

A creator contract must turn regulatory duties into enforceable promises. Below is a clause-by-clause guide with example wording. Use it as a starting point, not legal advice.

Example contract clauses for disclosure and substantiation

Disclosure clause

The Creator shall clearly and prominently disclose any commercial relationship with the Brand in all Content. Disclosure must use a clear label such as #ad or Paid Partnership in the first two lines of any caption or on the image itself. The Creator shall not use ambiguous labels such as #sp, #collab or #aff.

Substantiation clause

The Creator shall not make any factual claim about the Brand's products unless the Brand has provided written substantiation. The Creator shall not make health, beauty or financial claims without prior written approval.

Take-down clause

The Creator shall remove or amend any Content that the Brand or Agency reasonably believes breaches the CAP Code or CMA guidance within 24 hours of notice.

Indemnity clause

The Creator shall indemnify the Agency against fines, costs or damages arising from the Creator's failure to disclose or substantiate claims.

Record-keeping clause

The Creator shall keep copies of all Content, briefs and disclosure evidence for two years and provide them on request.

These clauses must be backed by a process. The agency should check every post before it goes live. If the creator refuses, the agency can withhold payment or terminate.

For a wider view of the UK rules that apply, map each clause to the relevant regulator. Disclosure maps to the ASA and CMA. Data maps to the ICO. Tax maps to HMRC.

How to adapt clauses for different creator tiers

Micro creators may need simpler wording and more support. Macro creators may have their own legal teams. The contract should scale but never drop the core duties.

Ad disclosure wording, hashtags and platform tools in UK briefs

UK briefs must specify the exact disclosure wording. Do not leave it to the creator. The brief should say: use #ad in the first two lines. Do not rely on #sponsored alone. Do not hide it in a hashtag block.

Platform tools can help but are not enough. Instagram's Paid Partnership label is useful, but the ASA still expects a clear label in the caption. TikTok's Branded Content toggle is similar. YouTube requires a paid promotion checkbox.

The brief should also cover stories, reels, live streams and podcasts. A verbal disclosure at the start of a podcast is good practice. A fleeting mention at the end is not.

Agencies should provide a disclosure checklist for each platform. The table below sets out the minimum requirements.

Platform	Required label	Placement	Platform tool
Instagram	#ad or Paid Partnership	First two lines of caption or on image	Paid Partnership label
TikTok	#ad	First two lines of caption or on-screen text	Branded Content toggle
YouTube	#ad	First two lines of description and in video	Paid promotion checkbox
Podcast	"This is an ad"	At the start of the segment	None
Blog	#ad	Above the fold or in the title	None

This table is a minimum. Some campaigns may need more. The agency should record which label was used and when.

For agencies that want a full process, see how to keep a talent agency compliant with UK rules and ethics.

Hashtag rules and common mistakes

#ad is the safest label. #sponsored is acceptable if it is prominent. #collab, #sp and #aff are not clear enough. Do not use multiple hashtags to hide the label.

Platform tools and their limits

Platform tools can be switched off by the creator. The contract must require the creator to use them where available. The agency should check the live post, not just the draft.

Sanctions, Trading Standards referrals and enforcement risk for agencies

The ASA can sanction advertisers in several ways. It can publish a ruling naming the advertiser. It can ask platforms to remove the ad. It can place its own paid search ads against the advertiser's name. It can also refer persistent breaches to Trading Standards.

The ASA's Rulings - ASA | CAP database shows how influencer and endorsement ads are adjudicated. Agencies should read rulings in their sector to see what triggers a breach.

Trading Standards referrals happen when an advertiser ignores ASA rulings. Trading Standards can prosecute under consumer protection law. That can lead to fines and criminal liability for directors.

The CMA can also act. It can accept undertakings or take court action. It can fine up to 10 per cent of global turnover for breaches of consumer law. That is a real risk for agencies that do not have a process.

Agencies should treat a ruling as a warning. One ruling can damage a brand's reputation. Repeated breaches can lead to platform bans. The contract should allow the agency to suspend a creator who breaches the code.

How ASA sanctions escalate

The ASA first tries to resolve the issue informally. If the advertiser does not comply, it publishes a ruling. If that fails, it refers to Trading Standards. The process is public at each stage.

What agencies can do to reduce risk

Train creators. Check posts before they go live. Keep records. Respond quickly to ASA enquiries. Do not ignore a complaint.

Copy Advice and pre-clearance workflow before a campaign goes live

The ASA offers a free Copy Advice service. It gives confidential advice on whether a campaign is likely to breach the CAP Code. Agencies can use it before a campaign goes live. The service is described on the Copy Advice - ASA | CAP page.

The workflow should be part of every campaign. Here is a step-by-step process.

1. Draft the brief and the disclosure wording.
2. Submit the draft to Copy Advice if the campaign is high risk.
3. Wait for the advice and amend the brief.
4. Brief the creator with the approved wording.
5. Check the post before it goes live.
6. Record the approval and the live post.

Copy Advice is not a binding pre-clearance, but it is strong evidence of good faith. If the ASA later investigates, the advice can help show you took compliance seriously.

High-risk campaigns include health, beauty, finance, alcohol and gambling. These need extra scrutiny. The agency should also check the CMA guidance for these sectors.

When to use Copy Advice

Use it for any campaign with a new claim, a new format or a new creator. Use it for campaigns that target vulnerable groups. Use it when the brand is unsure.

How to document the pre-clearance

Keep a copy of the submission and the advice. Note the date and the changes made. Store it with the campaign file.

Record-keeping: evidence, substantiation and audit trails for UK agencies

Agencies must keep records that show compliance. The ASA and CMA can ask for evidence. Trading Standards can demand it. The ICO can also ask about data handling.

Records should include the brief, the contract, the disclosure wording, the Copy Advice response, the live post, and any amendments. Keep them for at least two years. Some claims, such as health claims, may need longer.

Substantiation is key. If a creator says a product works, the brand must have evidence. The agency should hold that evidence. If the brand cannot provide it, the claim must be removed.

An audit trail should show who approved what and when. A simple spreadsheet can work. A shared drive with version control is better. The record should be easy to retrieve.

Agencies should also keep a log of ASA or CMA enquiries. This helps spot patterns. It also shows a proactive approach if a regulator asks.

What to keep and for how long

Keep contracts, briefs, disclosure evidence, live post screenshots, and substantiation documents. Two years is the minimum. For financial or health claims, keep for six years.

How to run an internal audit

Pick five campaigns each quarter. Check the disclosure, the substantiation and the records. Fix any gaps. Document the audit.

Common questions

What is the difference between ASA and CMA rules for influencers? The ASA enforces the CAP Code on ad recognition. The CMA enforces consumer protection law on misleading omissions. Both apply, and both can act.

Do I need a written contract with every creator? Yes. A written contract is the only way to enforce disclosure and substantiation duties. It also helps if a regulator asks for evidence.

Can an agency be liable for a creator's failure to disclose? Yes. The ASA and CMA can treat the agency as responsible if it controlled the brief. The contract should include indemnities, but liability cannot be removed.

What is Copy Advice and is it mandatory? Copy Advice is a free, confidential ASA service. It is not mandatory, but it is strong evidence of good faith. Use it for high-risk campaigns.

How long should we keep campaign records? At least two years. For health, financial or long-term claims, keep for six years.

What happens if a creator breaches the CAP Code? The ASA can publish a ruling, ask platforms to remove the ad, or refer to Trading Standards. The agency should have a take-down clause and a process to suspend the creator.