Skylark, with that inheritance scam, what happens if people reply to the letter is that they get a reply which seems innocent enough, things are going ahead and the investment manager will be in touch. After a bit, the target gets sent a reply saying something like "I've incurred costs, I can't pay it myself as I don't have the funds myself, so in order for the money to be released, I need money to proceed - can you arrange for your bank to transfer me this money". And more requests for money come to the victim and eventually the victim realises that there is no inheritance.
There have been similar scams for years, the best known being the Nigerian letter (because it originated in Nigeria) which is very similar except there's no reference to an inheritance, just a large sum of money which needs to be transferred out of Nigeria without the authorities knowing and they need your help.
The inheritance scam can seem plausible to some. Under the law in England and Wales, if someone dies and there isn't a will and there are no relatives who can be found, the estate become bona vacantia and passes to the crown. The property is administered by the Bona Vacantia division of the Treasury's Solicitor Department. There have been cases of fraudulent letters supposedly from this department sent to people, and the fraudsters require payment of a fee before the supposed inheritance can be released.
The concept of bona vacantia also applies to companies which have been dissolved but still have assets. There though the assets pass to the Exchequer. This is a very hot potato in the accountancy world in recent weeks because of a change in tax law. There's no need to explain it here as it would be of little interest to anyone other than owners of companies and accountants, but it means that in future any company which wants to close down voluntarily will, if it has assets over ÂĢ25,000, have to go through the process of a formal liquidation costing several thousand pounds, rather then an informal process of just getting the company struck off at minimal cost.