https://www.reuters.com/article/us-california-vaccine-apps/california-launches-digital-covid-19-vaccine-pass-but-wont-require-it-idUSKCN2DU1XN

OAKLAND, Calif. (Reuters) -California officials on Friday unveiled a website to access or download a digital copy of COVID-19 immunization records, though they stressed the state would not make it mandatory to carry the vaccine credentials.