To which adress do I sent the compensation claims?
Basically, there is no longer a generally valid e-mail address for compensation claims, but only a complaint form that is not so easy to find on the large Lufthansa website. Incidentally, this is not uncommon in today's airlines, as delayed passengers in the search just give up once and waive up to 600 €.
If you have worked with the search function on the website for information on flight delays, flight cancellations, missed connection flights and denied Boarding, you will quickly come to a link of the SÖP.
This is probably not a coincidence: here one is indeed informed of his claims for free and the submission is free, but these public arbitration bodies are not randomly free. In most cases, they lack the organizational ability to enforce claims in court. Experience has shown, however, that Lufthansa often resorts to bad weather or problems at the airport against a declared claim for compensation and is thus exempted from the obligation to pay compensation by Article 5 (3) of the EU Passenger Rights Regulation. And if an airline passenger here has no reliable evidence and is not ready to enforce his claims in court, he will probably go out empty-handed.
By the way, at Euroflyrefund the examination of the claims is also free of charge and the claim for compensation at Euroflyrefund costs only 29% of the compensation amount if it is successful, ie if Lufthansa actually pays. If you have a legal expenses insurance, you pay no commission and with a family booking from 4 persons only 19%.
And best of all: the cost risk of a lawsuit is entirely covered by Euroflyrefund.