French phrase
En cas de problème, contactez ~.
Meaning
If there is a problem, contact ___.
When to use it
A formal way to direct someone to a contact point. Common in hotels and other service settings.
Example dialogue
Il n'y a plus d'eau chaude dans ma chambre.
There is no hot water in my room.
En cas de problème, contactez la réception de l'hôtel.
If there is a problem, contact the hotel front desk.