Hmmm, I know that this is no scam, but I think now I know the reason for this wallet. This wallet was part of a community that is now down – and well, the admin is now in jail for other reasons. The idea was that no one could scam, because at the end the admin would take care of every transcation. The admin was trustworthy, and the communitiy run for several years.
So I think this was a community-only wallet, and now I have to look for the other guy. I hope I can contact him.
So just to be sure – a summary:
Some years ago I set up a 2of3 signature-wallet for receiving money for a product I sold. I delivered, and because the buyer was as stupid as I with electrum, the admin signed it and I got my money.
Now I need the OK from the admin everytime I want to spend money. FUCK!
I still can't believe that this should be the way the admin used to intend it because he was a really smart guy, but you say so.
If you have no other idea, I will try to contact the 3rd guy.
Many thanks for your help as yet, and have a good weekend!