On the basis of authenticated identities, trusted parties can verify and validate participants’ capabilities. This includes two aspects: 1) acquisition or evaluation of capabilities in a structured process and 2) verification of these claims against a digital identity. While the first aspect is typically covered by certifications or registrations, the second aspect is often carried out by commercial services. A trusted party therefore provides digital evidence of specified and measurable criteria. The content of those criteria is specified by regulations or by (sector-)specific agreements.