Nobody likes to think of themselves as a "sucker" who will fall for anything. But a CNN investigation found unscrupulous data brokers are selling information to scammers, who then target people more likely to succumb to mail fraud or another scheme.
Those people may be on a "suckers list," a registry of people who have been successfully solicited in the past. You could end up on this list if you have done something innocent like donate to a charity, or buy something from a mail order catalog.
To keep yourself off a "suckers list," you should start by finding out if a charity you donate to sells your information to any third parties.
That first step is simple, but the rest may take more leg work.