Legally sound certification:
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There is no exhaustive list, but there is a useful ordering: labels differ less in how strict they are than in their subject, that is in what they actually assess.
The list shows the pattern: most well-known marks assess a product group or a method of production. They are not built for a single measurable material property of the kind EmpCo and the PPWR require.
Since 27 September 2026 there is a legal benchmark for this. A sustainability label may only be used towards consumers if it was established by public authorities or is based on a certification scheme that makes its conditions public and meets four criteria: open to all companies on non-discriminatory terms, requirements drawn up with experts, procedures for non-compliance up to withdrawal, and compliance monitored by an independent third party.
Three things make that checkable in practice: is the programme publicly available? Is the assessing body accredited, usually to ISO/IEC 17065? Can the individual certificate be looked up, for example by a licence number in a public register?
Which trustmark fits which claim is set out in the trustmark overview.
Sources: Directive (EU) 2024/825 (EmpCo) · German Unfair Competition Act (UWG) · ISO/IEC 17065 (requirements for certification bodies)
Editorial responsibility: Malte Biss, CEO & Founder of flustix