Bank's questions about legal basement of withdrawing funds from mtgox

[Ban Curtain]

My bank manager called me and requested legal basis for receiving money from MtGox (I've withdrawed 1000usd). What documents I should send them? I suppose that it Is something like "terms of withdraw", but I can not find this terms on mtgox.
If someone stucked with the same problem please reply. Is it better to ask about that in mtgox support?

[Chet]

When did that get to be any business of the bank?

[empoweoqwj]

Lots of bank will query big deposits, but seriously, $1k, that's just anal 

[Ban Curtain]

When did that get to be any business of the bank?

Really I don't know. That is was the first transfer into that bank account (I've opened it few days ago) maybe it is usual security check. As far as I understand they need this explanation only once (after that they would not disturb me about the transfers)