From 6 August, the decree on the Green pass officially entered into force, which must be requested and exhibited by citizens when they go to indoor places, from restaurants to museums. While from September 1st, the Green Pass becomes mandatory also for taking airplanes, long-distance trains and ships. As well as at the university and for all school staff (here the new rules). The certificate proving that you have received the Covid-19 vaccination, that you are negative for a quick swab or that you have been cured of the virus must be shown in paper or digital version. Those who do not always want to have the sheet with the QR code containing the Green pass in their wallet or purse can also have it in digital version, i.e. on their smartphone. Recommended option, because it is safer. It is therefore better to understand how to always have it at hand, given that the document will become increasingly indispensable. There are several options, here they are listed here.