Questions & Answers about Na služebně jsem nahlásil krádež.
In this sentence, na služebně means at the station/office, most naturally at the police station in this context.
The noun služebna is a place where an official service operates, and in everyday Czech, policejní služebna is a police station. Because the sentence is about reporting a theft, Czech speakers will usually understand na služebně as at the police station, even without policejní being said explicitly.
So:
- služebna = station/office/post
- na služebně = at the station
This is mainly a matter of Czech usage and collocation.
Czech often uses na with certain public institutions, workplaces, and offices where English would use in or at. So na služebně is the natural idiomatic expression.
A learner often wants to map:
- na = on
- v = in
But that does not always work in Czech. With locations, prepositions are often fixed by usage.
For example, Czech commonly says:
- na policii = at the police
- na poště = at the post office
- na úřadě = at the office / authority office
- na služebně = at the station
So here, na služebně is just the normal way to say it.