The Government Technology Agency of Singapore and the Ministry of Health (MoH) jointly developed HealthCerts, a globally interoperable digital standard to facilitate cross-border verification of health documents. HealthCerts is a set of open-source digital standards and used to issue digital COVID-19 test result certificates. From 10 March, 2021, travelers who receive a pre-departure COVID-19 test at an authorised clinic in Singapore will be notified of their results through a digital certificate, in line with HealthCerts. Subsequently, travelers will have to upload their digital certificate to a separate website, called Notarise, which enables locally-issued certificates to be formally endorsed by the MoH so that they can be recognised at Singapore's Changi Airport and foreign airports.