I think 1NbyAR3YeU1efCqrdsDctZobUEDWazN4y2 is an old exchange.

I can see I received from this address to my multibit wallet

460dce78c0796661d38358fe6efd1ed4bfcae7f4dd0224b18e2452cb5a2737fc
a02c3e7ea4def124dd25337d674ae3b399f7dd1f652e8ec23fa03a661a3b9d13
f924422f2d5b701fb26c3ccdcf64f213a0b2c29f2929d7a62be2609965d7fe53

I have no idea why I would have set that as a Sig campaign address!

Perhaps it was my first BTC wallet address but that wallet will be long gone i think.

Thanks for the help guys, guess my old account remains dead!