eRouška (mobile app) reports a risky contact, but I wasn't anywhere that day
If you are absolutely sure that you have not been anywhere, not even by car (eRouška app could have been installed, for example, by the driver in the next line a traffic jam), first check that you have the current version installed. It may be an eRouška app error. Unfortunately, this cannot be completely prevented, as with any other location-based application. It is possible that this isn't a singular event and you can reach out to the eRouška team at firstname.lastname@example.org.