What is Product Serialisation and Why DPPs Need It

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Defining Product Serialisation

Product serialisation is the process of assigning a unique identifier to each individual unit of a product. Unlike batch-level tracking, where all items manufactured together share a single code, serialisation ensures that every single item can be individually distinguished from every other item, even items of the same make, model, and colour. Think of it as giving each product its own fingerprint.

In traditional manufacturing, a product might carry a stock-keeping unit (SKU) or a batch number. These identifiers tell you what the product is and roughly when it was made, but they cannot tell you which specific unit you are holding. Serialisation closes that gap by appending an additional layer of information, a serial number, that makes the identifier truly unique at the item level.

Under the EU's Ecodesign for Sustainable Products Regulation (ESPR), product serialisation is not optional. Every product that requires a Digital Product Passport must carry a unique product identifier that links directly to its passport data. This requirement is what transforms a static label into a living, queryable record of a product's history and composition.

How Product Serialisation Works in Practice

The mechanics of product serialisation typically involve three components: an issuing authority or system that generates unique codes, a data carrier (such as a QR code or RFID tag) that encodes the identifier onto the physical product, and a backend system that stores the associated passport data. When a consumer, regulator, or recycler scans the data carrier, the serial number resolves to the correct passport record.

Most serialisation schemes follow an established standard such as GS1 Digital Link, which combines a Global Trade Item Number (GTIN) with an individual serial number. The resulting URI can be encoded into a QR code and printed onto product packaging, labels, or even the product itself. Because the identifier is structured according to an international standard, any system that understands the standard can parse and interpret the data.

For manufacturers, implementing serialisation means integrating identifier generation into the production line. Each unit receives its unique code at the point of manufacture, and that code is logged against the product's bill of materials, sustainability data, and compliance documentation. This information then populates the Digital Product Passport.

Why the ESPR Mandates Serialisation

The ESPR's ambition extends far beyond labelling. The regulation envisions a system in which every product placed on the EU market can be individually traced from manufacture through use to end of life. Serialisation is the enabling mechanism for this vision. Without item-level identifiers, authorities cannot verify that a specific unit complies with its declared specifications, and consumers cannot access the sustainability data that the regulation promises to make available.

Serialisation also supports market surveillance. If a defective or non-compliant batch is discovered, serialised identifiers allow regulators to pinpoint exactly which units are affected and where they are in the supply chain. This precision reduces the scope and cost of recalls and prevents compliant products from being unnecessarily withdrawn.

Furthermore, serialisation underpins the circular-economy objectives of the ESPR. When a product reaches end of life, recyclers and refurbishers need to know its exact material composition. A serialised identifier linked to a Digital Product Passport provides that information instantly, enabling more efficient sorting, disassembly, and material recovery. The ESPR regulation text explicitly ties unique identifiers to the passport data model for this reason.

Serialisation vs Batch Tracking vs SKU Identification

It is important to understand how serialisation differs from other forms of product identification, as each serves a distinct purpose:

• SKU identification groups products by type. All units of the same product share the same SKU. This is useful for inventory management and sales reporting but cannot distinguish individual units.
• Batch or lot tracking groups products by manufacturing run. All units produced in the same batch share a batch number. This allows traceability at the batch level and is commonly used in food and pharmaceutical industries for recall management.
• Serialisation assigns a unique identifier to each individual unit. This enables item-level traceability, linking each physical product to its own specific data record.

For Digital Product Passports, batch-level tracking is insufficient. The ESPR requires that each product have its own passport, which means each product must have its own unique identifier. Serialisation is therefore the minimum level of identification granularity required for compliance.

The Role of GS1 Standards in Serialisation

The GS1 system is the most widely adopted framework for product serialisation globally. A GS1-compliant serialised identifier typically consists of a GTIN (which identifies the product type) combined with a serial number (which identifies the individual unit). Together, these form a globally unique identifier that can be resolved via the GS1 Digital Link standard.

Using GS1 standards for serialisation offers several advantages. First, the identifiers are globally unique, eliminating the risk of collisions between manufacturers. Second, the standards are widely supported by supply-chain partners, retailers, and regulators, ensuring interoperability. Third, GS1 Digital Link URIs can be encoded into QR codes that serve dual purposes: they work as traditional product barcodes for point-of-sale scanning and as web links that resolve to the product's Digital Product Passport.

The GS1 Digital Link standard is particularly relevant because it allows the same QR code to direct different users to different information depending on context. A consumer might see sustainability information, while a recycler might see material-composition data, all from the same scan of the same code.

Implementation Challenges and Considerations

Implementing serialisation at scale presents several practical challenges that businesses need to plan for:

• Production-line integration: Generating and applying unique codes to every unit requires changes to manufacturing equipment and processes. High-speed production lines may need specialised printing or encoding equipment.
• Data management: Each serialised product generates a data record that must be stored, maintained, and made accessible for the lifetime of the product. For high-volume manufacturers, this can mean managing millions or billions of records.
• Supply-chain coordination: Serialised identifiers must be readable and interpretable by every actor in the supply chain, from manufacturer to distributor to retailer to recycler. This requires agreement on standards and investment in scanning infrastructure.
• Cost: Serialisation adds cost at multiple points, identifier generation, data-carrier application, data storage, and system integration. These costs must be weighed against the compliance benefits and the penalties for non-compliance.

Despite these challenges, many industries have already implemented serialisation successfully. The pharmaceutical sector, for example, has been serialising individual medicine packs for years under the EU Falsified Medicines Directive. The lessons learned from that rollout are directly applicable to the broader product categories covered by the ESPR.

How MyProductPassport Supports Serialisation

Platforms like MyProductPassport simplify the serialisation process by automatically generating unique identifiers for each product entered into the system. When you create a Digital Product Passport, the platform assigns a UUID-based identifier and generates the corresponding data carrier (such as a QR code) that can be printed and applied to the physical product.

The system supports GS1-compatible identifiers for businesses that use the GS1 standard, and it stores all passport data in a structured format that can be accessed via the unique identifier. This means businesses do not need to build their own serialisation infrastructure from scratch, they can leverage the platform to meet ESPR requirements efficiently.

For businesses that already have existing serialisation systems, the platform's API allows integration with external identifier-generation systems, ensuring that existing investments in serialisation infrastructure are preserved and extended rather than replaced.

Preparing Your Business for Serialisation Requirements

With the battery passport applying from 18 February 2027 and the ESPR's product-specific delegated acts from 2028 onwards, businesses should start preparing for serialisation requirements now. The first step is to audit your current product-identification systems to understand what level of granularity you already achieve and what gaps need to be filled.

Next, evaluate your data infrastructure. Serialisation generates significant volumes of data, and you need systems capable of storing, indexing, and serving that data reliably over the full lifecycle of your products. Cloud-based DPP platforms can handle this burden, but the integration points with your existing enterprise systems need careful planning.

Finally, engage with your supply-chain partners. Serialisation is only effective if the identifiers can be read and acted upon throughout the value chain. Early coordination with distributors, retailers, and end-of-life processors will smooth the transition and ensure that your serialised Digital Product Passports deliver value at every stage.