Your information turns the case even more difficult. You were supposed to receive the 5 BTC, but you confused the receiving address. That means the 5 BTC was owned by another user and not by you. In this case, how can you prove that? What evidence you have that the another owner should send the 5 BTC to you?
If it helps anything, I could ask the other user to post here. This was part of a deal, with the 5 BTC being part of the payment.
So the address 1JYC3GbbhHiYKkZkPV2PhsdYPPDAUjjomS is owned by you? Do you receive funds from Deepbit mining pool?
Yes it is and yes I did.
Excuse me, but was has my original question (who owns this adr.?) to do with which pools I mine on?
Is 1Nbjpo1tkeayJ28me2kNcZ3ZoqBQHJqoAx owned by you?