After a COVID-19 rapid antigen test on a nasopharyngeal swab specimen is done, a certificate in Lithuanian, English or Russian can be issued to anyone interested who tested negative. If you are doing the test for travel, find out in advance which kind of COVID-19 test certificate is acknowledged in the country you intend to go to. A certificate for a COVID-19 RT-PCR test is the most frequently requested. The certificate is signed with a qualified electronic signature and sent to the email address the client provides. To access the document you will need a password, which you will receive in a text message.