Do you have to declare a safe to your insurer?

That is up to your insurer. Ask your insurer or broker whether you need to report a safe and which grade is required for the amounts you want to insure.

If the insurer requires a specific EN 1143-1 or EN 14450 grade, we supply a safe of that grade with the matching certificate. You will find an overview of the resistance grades and indicative insurable values.