As I have already written, with the signature on the application for the installation of the electricity meter, the signatory declares that the E— system is completed and is to be commissioned, thus this person is also liable at that moment. This is also stated on the completion report for the meter.. whether this is actually true does not interest the grid operator at all. After all, he has the signature for that. This person also simultaneously signs that your grounding system, which he probably has never seen, complies with the current regulations and has been installed accordingly. But what do you need insurance for in that case? I have been a registered installer since 1974 until today and have applied for numerous meters, but confirmations for insurances were never required. Enlighten me.