Serbia will have the same conditions for recognition of vaccination certificates as EU member states
The Ministry of Health of the Czech Republic orders:
1. the vaccination certificate issued by the Republic of Serbia shall be considered as a national vaccination certificate for the purposes of epidemiological measures concerning entry into and stay in the territory of the Czech Republic,
2. a model certificate is published on the website of the Ministry of Health.
The full wording of the measure can be found here (only in Czech).