There's that. There will always be people who bite the hook when they get a call about a family member in jail needing Bond, or the cops are on the way to your house within the hour because of an IRS bill.
The IRS sends letters. They don't start anything with a phone call.
You can't legally participate in and win a foreign lottery, especially one you didn't enter.
There are more Nigerian Princes than Cherokee Princesses....but don't expect them to be real.
If they want you to pony up money, deposit a check and send them some cash, or are offering something for free, don't, don't, and they won't, as a rule.