[Yorkie]

Oops, you've breached confidentiality. That's your inheritance gone, you norty lad! 

[Blackpool rocket]

I had the same thing, not the subject but a letter in the post, this was about a year ago. Similar sum, I can't remember now.
I set up a new email to reply in the hope of string them along, getting them to do ridiculous authenticity tests and such like, I'd got it all planned.
Never heard another thing, blast!