Supply-Chain Traceability and the DPP

When preparing a Digital Product Passport, the biggest challenge usually arises not in your own production but in your supply chain. Where a material comes from, its recycled-content share, its chemical declarations — most of this sits not with you but with your suppliers.

Why is traceability the passport's foundation?

For the circularity and compliance data the passport carries to be verifiable, it must be traceable back to its source. The claim "this fabric is 40% recycled polyester" is credible only if it rests on evidence from the yarn supplier. This is at the heart of the verification and trust question.

Layers of traceability

1. Tier 1: your direct suppliers — most manufacturers know this layer.
2. Tier 2 and below: your supplier's supplier — where visibility weakens.
3. Raw-material source: origin and extraction conditions — the hardest but most valuable layer.

Regulations such as ESPR and the battery passport demand transparency at ever-deeper layers.

How is the data collected?

• Supplier questionnaires: request material and certificate data through structured forms.
• Documentary evidence: test reports, declarations of conformity, certificates.
• Digital linking: where possible, link to the supplier's own passport/data — passports can chain together.

IDPP eases this process with supplier invitations and a structured data-collection surface; once verified, the collected data is written into the product passport.

For exporters

Collecting supply-chain data takes time — which is why you should start without waiting for the timeline. The first step is mapping your product tree and critical suppliers. Our data-collection checklist helps you draw that map.

Frequently asked questions