Start with structure, then replace every placeholder with information that is true, relevant, and natural for your context. These templates are intentionally skeletal so your final writing does not sound mass-produced.
A strong notice is complete without being crowded: readers can identify the event or issue, timing, location, eligibility, deadline, action, and contact or issuing authority when those details are relevant, and no space is spent on decorative language.
General notice [Organization / authority] NOTICE [Date if required] [Specific heading] [Target readers] are informed that [event/change/issue] will [occur/apply] on [date/time] at [place]. [Eligibility/action]. Please [register/report/submit/contact] by [deadline] through [method]. [Name] [Role / contact if required]
Event notice Event: [x] For: [audience] Date/time: [x] Venue: [x] Purpose: [one line] Action: [register/attend/apply] Deadline: [x] Contact: [x]
Schedule change Heading: [what changed] Affected group: [x] Old arrangement: [only if needed] New date/time/place: [x] Required action: [x] Contact/update source: [x]
Lost and found Item: [general description] Where/when found or lost: [x] Owner action: [where to report] Verification: [owner should provide identifying detail] Contact/issuer: [x]