Track Zefix records and get alerted when the official Switzerland register publishes a change.
Legal name change; Registration status change (active, struck off, dissolved); Registered address change; Legal form change; SHAB/FOSC publication.
Watched records are re-queried against the official source on a recurring schedule, and an alert is raised only when a published field actually differs from the last snapshot.
Source: Zefix — Zentraler Firmenindex official search