Last time I was asking LH for compensation it went smooth - I wrote clearly that delay was caused by flight operated by LH and therefore I missed my connection, so I am asking for compensation 250€ based on regulation. Attached all documents, boarding passes, original schedule, when rescheduled flight landed proving delay. Response was short, we are so sorry and sending money soon.

However, bigger issue I had with sending the request. First got lost in LH five star IT, next was not delivered due to internal error of the form, finally I made it old school via mail...