skline securities ben gatland sent me a letter stating i had won $50,000.00 US i needed to call to confirm my name and phone number london, Other

I was sent a letter in the mail stating i had won $50,000.00 US from skyline securities in London england      I had to call and confirm my identity and was told i would receive 2 checks 1 for the clearence fee and the other check would be sent after that  I was told to keep this in the strictest confidentiality i should receive them in about 7 buisiness days i will keep the checks and give them to the proper authorities 
 iwas given 2 names
1) ben gatland
2)mary hart
the letter i received said final notice i know its a scam