Username: Viziano Rank: Full Member Amount to be loaned: 0.016 Repayment Date: 10.01.2017 Bitcoin Address: 1pz33yrr7Yhnx42hPQ1Hf1zrDMsEMoUVt Collateral: This account. Optional Service (see V.): Of course.
Similar to what condoras said, I would require a signed message. Maybe you could export the private key of blockchain.info. Not sure it that is allowed, but if it is you can use another wallet to sign the address from.