Doesn't have to be retired professionals. There have been cases in Germany where employees of pharmacies fake these certificates [0]. The link talks about hundr

Doesn't have to be retired professionals. There have been cases in Germany where employees of pharmacies fake these certificates [0]. The link talks about hundreds of faked certificates from a single pharmacy. [0] https://www.br.de/nachrichten/bayern/hunderte-digitale-impfpaesse-gefaelscht-festnahme-in-muenchen,SmfuqIK https://www.br.de/nachrichten/bayern/hunderte-digitale-impfp... (German)