In NY it’s a public record (for Mega at least, I can only assume its the same for power ball)
Although Mega Millions is a national lottery, rules on winner publicity vary by state. In New York, for example, winners’ names are a public record.
So you better budget in hiring personal protection as you become an extremely high kidnapping risk as a fresh multi millionaire and there are plenty of people that hunt them for blackmail profit. Not to mention expecting everybody and their mother will be begging for a piece and you will never be able to trust anybody in the future as you won’t be sure if they are sincere or not.
:ponder