If it was a confidential Information than it should be sent to people you trust and not to a random newbie or anyone that is not a part of your team or outside of your confidence. If it's leaked then there is no way to hide it now better you make the results of that sale public to get some extra publicity.
This is not the problem, I'm talking about some points other than the sale. And this sale didn't happen, it was being negotiated and we canceled it.