Only vaccinated or tested persons are allowed to enter the trade fair grounds ("CH3CK": vaccinated, recovered or tested). An EU DCC (Digital Covid Certificate) must be submitted as proof. Upon request, an identification document must be presented to verify identity. For non-EU citizens without access to the EU DCC certificate, the following exception applies: Click here for detailed information: https://support.koelnmesse.com/koeln/What-should-I-do-if-I-do-not-have-direct-access-to-a-Digital-COVID-Certificate-that-meets-the-EU-DCC-standard%3F.9290254129.html