These include scams which can go under the name of genuine lotteries like the UK National Lottery and the El Gordo Spanish lottery. Unsolicited email or telephone calls tell people they are being entered or have already been entered into a prize draw.
Later, they receive a call congratulating them on winning a substantial prize in a national lottery . But before they can claim their prize, they are told they must send money to pay for administration fees and taxes. The prize, of course, does not exist. No genuine lottery asks for money to pay fees or notifies it's winners via email.