Relying party
A relying party is the organisation that requests a verifiable credential from a holder and relies on it to make a decision, such as a bank onboarding a new business or a shop checking a customer is old enough to buy an age-restricted product.
A relying party sends a presentation request over a protocol such as OpenID4VP describing which credential and claims it needs, then checks the response against the issuer that originally signed it before acting on the result. Under eIDAS 2.0, every EU member state must ensure relying parties in regulated sectors can accept EUDI Wallet credentials, so a relying party that integrates once can accept credentials from any wallet issued anywhere in the Union.