The COVID certificate can be accessed via the COVIDCert NI App
International travellers are encouraged to download and register for the COVIDCert NI App in advance of booking their travel.
International travellers should continue to follow the entry requirements of the country they are travelling to, such as proof of a negative COVID-19 test on arrival. They are recommended to research the requirements of their destination country before travelling.
See the GOV.UK advice about travelling abroad from NI during the pandemic.