The renewal of school ID cards with an ISIC license (revalidation) is now done exclusively digitally; there is no visual revalidation with a hologram or thermal printing. More information on this topic can be found on the ISIC website: https://www.isic.cz/clanek/novinky/jak-na-prodlouzeni-platnosti-prukazu-bez-revalidacni-znamky-a-kde-uz-je-to-mozne/.