This is the 11499th most frequent Swedish word.
oanmälda
Unannounced.
Here, 'oanmälda' is used as an adjective describing the visitors, indicating that their visit was not announced beforehand.
Vi fick oanmälda besökare i morse.
We had unannounced visitors this morning.
In this usage, 'oanmäld' is an adjective modifying 'inspektion', highlighting that the inspection occurred without prior notification.
En oanmäld inspektion överraskade de anställda.
An unannounced inspection surprised the employees.
'Oanmälda' here describes 'uppdrag', signifying that the assignments were given without prior announcement.