I Revived notice that I had won 2nd prize of $485, 000.00 USD in the "USA Mega" drawing of the "International Sweepstakes". The letter included a check for $4, 800.00 "to help pay the Taxes" on my alleged winnings.

My own investigation indicats that:

Hazsco Financial Inc. is a fake company.
International Sweepstakes is a fake organization.
The check was a forgery.
The company on the check is a real company, but was unaware someone was issuing checks in there name. (my check was from a food processes)

If you get a similar letter and check, DO NOT DEPOSIT IT INTO AN ACCOUNT! The perpetrator may be able to use the bounced check information to get your account number. If deposited, the type of check used often (releases) instantly, but later bounces. This means it will look like the money is in your account for a day or two, but then it will disappear again.

If you want to test it the check is real, you can take it to the issuing bank, and attempt to cash it. The issuing bank will verify the check before they hand over any money, and perpetrator has no way of getting your account information. DO BRING THE LETTER WITH YOU! If you don't, you may end up spending some time explaining to a judge why you were attempting to cash a fake check.