Net Quantity, Batch Codes & RP Address on Cosmetic Labels

Some of the smallest details on a cosmetic label are also legally essential: the net quantity, the batch code and the Responsible Person address. They are easy to overlook in the rush to launch, yet missing or mislabelling them is a genuine compliance failure. This guide explains each one and how to get them right for the UK and EU.

These sit alongside the other label elements covered in our guides to ingredient lists, durability and PAO and warnings and mandatory statements.

Net quantity (weight or volume)

The label must state the nominal content at the time of packaging the weight for solids and the volume for liquids usually in grams or millilitres. This tells the consumer how much product they are buying and must be accurate to the amount actually packed. It appears on the pack in legible form, and for liquids and solids the appropriate unit (ml or g) is used.

There are limited exceptions for very small or specific packs for example, certain very small packages, free samples and single use items can be treated differently but the default expectation is that the net quantity is shown. Some brands also use the optional ‘e’ mark, which indicates the average quantity system has been followed; it is not mandatory but is widely recognised.

The batch code

Every cosmetic must carry a batch number (or batch code) that identifies the specific production batch. This is the backbone of traceability: if a safety issue arises, the batch code lets the Responsible Person and authorities identify exactly which units are affected and act on them, rather than recalling everything. It links the physical product back to your production records and the relevant documentation.

The batch code can be short and is often printed, stamped or embossed rather than included in the main artwork, which is fine as long as it is legible. Where the package is too small to carry it, it may appear on accompanying material. The essential point is that you keep records linking each batch code to what was made, when, and from which materials traceability is only as good as the records behind the code.

The Responsible Person address

The label must show the name and address of the Responsible Person for the market of sale. This must be a real, contactable address the place where the Product Information File can be made available to authorities and it must sit in the correct market: a UK address for Great Britain, an EU address for the EU. It is not merely a return address; it identifies who is legally accountable for the product.

For brands selling in both markets after Brexit, this frequently means showing different RP details on UK and EU labels, since one entity rarely covers both. Our guides to the Responsible Person and RP obligations explain why this address carries real legal weight.

Country of origin

Where a cosmetic is imported, the label must indicate its country of origin typically shown as “Made in …”. This applies to products brought into the market from elsewhere and helps establish the regulatory pathway the product followed. For products made within the market of sale it is handled accordingly, but importers in particular should make sure origin is shown where required.

This detail often catches out brands that import finished or semi-finished products and assume the manufacturer's existing label is enough. As with the RP address, importing brings its own labelling responsibilities that the importer must satisfy.

Why these small details matter

It is tempting to see net quantity, batch codes and addresses as minor next to safety assessment and ingredient declarations. But they are exactly the elements an inspector or marketplace checks first, because they are quick to verify and immediately reveal whether a brand has done its compliance properly. A beautiful product with no batch code or a missing RP address signals a compliance gap that invites closer scrutiny.

They also do real work. The batch code makes a targeted recall possible; the net quantity protects the consumer from short measure; the RP address ensures someone is answerable. Treating them as essential rather than incidental is part of a professional, compliant product and they cost nothing to get right when planned from the start.

Designing a label that includes it all

Net quantity, batch code and RP address rarely fail because a brand refuses to include them they fail because no one planned where they would go. The fix is to treat them as fixed slots in your artwork from the first draft, not afterthoughts squeezed in once the design looks pretty. A simple approach is to reserve a small “information panel” on the pack for the RP name and address, net quantity and durability, and to assign the batch code to a print, stamp or emboss on the base or crimp where it does not disturb the main design.

Because the batch code is applied per production run, it is usually added at filling rather than printed into the master artwork. That is perfectly compliant, but it means deciding in advance how you will apply it a hand stamp, an inkjet coder, or a pre-printed sticker so every unit genuinely carries one. Brands that skip this step often discover at launch that their beautiful pre-printed labels have nowhere for the batch code to go.

For sellers shipping to both the UK and the EU, remember these elements can differ by market: the RP address changes, and country-of-origin wording may need translating. Building market-specific versions into your label plan from the outset is far cheaper than relabelling stock at a border or covering pristine packs with corrective stickers.

Net quantity, batch & address checklist

• Show net quantity (weight or volume) accurately, with the right unit.

• Include a batch code on every unit, with records behind it.

• Show the Responsible Person name and market-correct address.

• Indicate country of origin for imported products.

• Keep everything legible and indelible on the finished pack.

• Use market-correct versions for UK and EU where they differ.

Frequently asked questions

How do I show net quantity on a cosmetic?

State the nominal content at packaging weight in grams for solids, volume in millilitres for liquids legibly on the pack. Limited exceptions apply to very small packs, samples and single-use items.

What is a cosmetic batch code for?

It identifies the production batch and underpins traceability, letting the Responsible Person and authorities target the exact units affected if a safety issue arises.

What is the 'e' mark?

An optional mark indicating the average quantity system has been followed for filling. It is widely recognised but not mandatory.

Whose address goes on the label?

The Responsible Person for the market of sale a contactable address where the PIF can be made available, in the UK for Great Britain and the EU for the EU.

Do I need to show country of origin?

Yes, for imported products, typically as 'Made in …'. Importers in particular must ensure origin is shown where required.

Where should the batch code physically go?

It can be printed, stamped or embossed anywhere legible commonly on the base, crimp or a side panel and is usually applied at filling rather than in the master artwork. The key is that every unit carries one and your records link it to the production run.

Can one label cover both UK and EU sales?

Often not, because the Responsible Person address differs by market and origin wording may need translating. Many brands run market-specific label versions to stay compliant in both.

References: Regulation (EC) No 1223/2009, Article 19 (EUR-Lex); UK Cosmetics Regulation as retained; weights and measures average-quantity rules; OPSS guidance. General information only, not legal advice.