How can i check the authencity check of U K N L foundation & metro police department UK' winning offer?

Look up the number to the police headquarters in the phone book (don't use the numbers given in the letter). Call and ask to speak to Insp. Mike Bowen. If he doesn't exist, then you know it's a scam. If he does exist, ask him for more details. Did you even buy a lottery ticket? If not, why did you win?