Serious Undesirable Effects (SUE) Reporting: What Cosmetic Brands Must Do After Launch

Quick Answer

If a consumer or health professional reports a serious adverse reaction to your cosmetic product, you have a legal duty under Article 23 of the Cosmetics Regulation to notify the relevant authority without delay. This is called reporting a Serious Undesirable Effect (SUE), and it's a standing obligation on the Responsible Person and distributors that continues for as long as the product is on the market  not a one-time task completed at launch.

Undesirable Effect vs Serious Undesirable Effect

The Cosmetics Regulation draws a specific line between two related but legally distinct concepts. An Undesirable Effect (UE) is any adverse reaction attributable to the normal or reasonably foreseeable use of a cosmetic product a mild irritation or an individual allergic reaction would typically fall here. A Serious Undesirable Effect (SUE) is a narrower, more severe category: one that results in temporary or permanent functional incapacity, disability, hospitalisation, congenital anomalies, or an immediate vital risk or death. All UEs must be recorded as part of your safety documentation, but only SUEs trigger the mandatory, time-sensitive notification duty.

Who Has to Report, and to Whom

The duty to report sits with the Responsible Person and distributors, who must notify all serious undesirable effects known to them, or which may reasonably be expected to be known to them, to the competent authority of the member state where the effect occurred. Whichever party reports first, the relevant authority is then required to pass that information on to the other competent authorities across the EU, and to the Responsible Person if a distributor made the initial report.

How This Works in the UK

In Great Britain, SUE and safeguarding notifications are submitted to the Office for Product Safety and Standards (OPSS), using the specific SUE forms published for this purpose one for Responsible Persons and distributors, and a separate one for Trading Standards. Completed forms are submitted by email to the address OPSS has designated specifically for this reporting channel, as set out in the official GOV.UK guidance on SUE and safeguarding notifications.

How This Works in the EU

Within the EU, each member state designates its own competent authority to receive SUE notifications, and the European Commission has published detailed SUE reporting guidelines to support a uniform approach across the bloc, including a structured causality assessment process used to evaluate the likelihood that a reported event was genuinely caused by the cosmetic product in question, rather than an unrelated factor.

What "Without Delay" Actually Means in Practice

The Regulation doesn't set a fixed number of days or hours the standard is "without delay," which in practice means reporting as soon as the Responsible Person or distributor becomes aware of a serious undesirable effect, not batching reports together or waiting for a convenient reporting cycle. Building a simple, working internal process for capturing and escalating customer complaints quickly is what actually makes this standard achievable in practice.

What Information a Report Typically Needs

• Clear identification of the cosmetic product involved, including batch information where available
• A description of the undesirable effect and its severity
• Available information on how the product was used
• Any known medical or clinical details connected to the reported effect
• Contact details sufficient for the authority to follow up if needed

How This Connects to Your CPSR

Undesirable effect data isn't just a post-launch reporting exercise the Cosmetics Regulation specifically requires available data on undesirable effects to be included in the safety documentation underpinning your product. This means a pattern of reported reactions can, and should, feed back into your safety assessor's ongoing review of the product, rather than being treated as a reporting formality that sits separately from your original CPSR safety assessment.

Common Mistakes Brands Make

Mistake #1 — Treating customer complaints as a customer service issue only. A severe reaction reported through a support inbox still needs to be assessed against the SUE criteria, not just handled as a refund request.

Mistake #2 — Waiting to "confirm" causation before reporting. The reporting duty is triggered by becoming aware of a serious undesirable effect, not by first establishing definitive proof that the product caused it that assessment happens after notification, by the competent authority.

Mistake #3 — Not having a designated process for who within the business actually files the report. Without a clear internal owner, "without delay" quietly becomes "whenever someone gets around to it."

Mistake #4 — Forgetting that distributors carry this duty too, not just the Responsible Person. If you distribute third-party cosmetic brands, this obligation applies to you directly for those products as well.

Practical Checklist

• Set up a clear internal process for escalating serious customer complaints to whoever manages regulatory reporting.
• Familiarise your team with the distinction between a routine complaint, an undesirable effect, and a serious undesirable effect.
• Know in advance which specific form and reporting channel applies to your market (UK or EU, and which member state).
• Report promptly once aware of a serious undesirable effect, rather than waiting for internal confirmation of causation.
• Feed undesirable effect data back into your CPSR review process, not just your regulatory reporting log.

Frequently Asked Questions

What's the difference between an undesirable effect and a serious undesirable effect?

An undesirable effect is any adverse reaction from normal or reasonably foreseeable use. A serious undesirable effect is a narrower category involving functional incapacity, disability, hospitalisation, congenital anomalies, or immediate vital risk or death, and it's this narrower category that triggers mandatory notification.

Do I need to prove the product caused the reaction before reporting?

No. The duty is to report once you become aware of a serious undesirable effect. Assessing the likelihood that the product actually caused it is a separate causality assessment carried out as part of the regulatory process after reporting.

Who do I report a SUE to in Great Britain?

To the Office for Product Safety and Standards (OPSS), using the designated SUE reporting forms and email address published in GOV.UK's guidance on SUE and safeguarding notifications for cosmetics.

Does this obligation apply to distributors, or only to brand owners?

Both. The Regulation places the reporting duty on the Responsible Person and distributors alike, so anyone distributing a cosmetic product carries this obligation independently.

Final Word

SUE reporting is one of the few cosmetic compliance obligations that's genuinely ongoing rather than front-loaded at launch it depends entirely on how well your business listens to, recognises, and escalates serious customer reactions after a product is already on shelves. A clear internal process, agreed before you ever need it, is what turns "without delay" from a legal phrase into something your team can actually achieve.

Want help setting up your post-launch compliance processes? NestQual supports cosmetic brands beyond launch, including CPSR reviews informed by real-world product feedback and ongoing Responsible Person services.

Get a CPSR for your product See the Complete Compliance Pack

Sources

1. Regulation (EC) No 1223/2009, Article 23 — Communication of Serious Undesirable Effects — legislation.gov.uk
2. GOV.UK, SUE and Safeguarding Notifications for Cosmetics — gov.uk
3. GOV.UK, Cosmetic Products: Reporting SUEs (forms) — gov.uk
4. European Parliament and Council, Regulation (EC) No 1223/2009 on cosmetic products — eur-lex.europa.eu
5. Cosmetic, Toiletry and Perfumery Association (CTPA), Safety of Cosmetics — ctpa.org.uk

This article is for general information and does not constitute legal advice. Always confirm current requirements for your specific product and market with a qualified safety assessor or Responsible Person.