What should I do about someone who sent money through the mail??

Ok well I won this contest for best picture and the Most amount of votes from people.

And the first prize was $150 Cash. Well I won the contest and I didn't talk to the guy who was supposed to be giving out the money on the phone. I just emailed him my address and talked to him yesterday and he said he sent it out last week.

Well I looked through my mail and everywhere and haven't seen an envelope with my name on it anywhere!

The thing that bothers me the most is that He sent $150 CASH through the mail when everybody should know you aren't supposed to send cash through the mail, Only Checks.

Well I'm kinda stressed out because he swears on his child's life that he sent it out, But I do not have it. Is there a Possibility that someone in the postal service seen money through the envelope and stole my money? Should i try and call the postal office to see if they have it or just keep looking or insist this guy sends me a Check this time and If the Money showed up later I'd send it backWhat should I do about someone who sent money through the mail??
THAT MONEY SHOULD HAVE BEEN SENT BY REGISTERED MAIL WHERE YOU SIGN FOR IT. ALSO THATS RIDICULOUS IF HE SENT CASH IN AN ENVELOPE. IF HE SAID HE SENT A CHECK HE CAN CANCEL THE CHECK HE SENT AND SEND YOU ANOTHER CHECK.. NO MATTER WHAT WENT ON YOU SHOULD HAVE YOUR WINNING $ 150.00 IF HE SENT A MONEY ORDER THERE IS A TRACING NUMBER INVOLVED . I HOPE HE ISNT A CROOK. ! DONT LET HIM GET AWAY WITH THIS. !What should I do about someone who sent money through the mail??
This just doesn't seem legitimate. Any reputable company would never send cash. I doubt that you will ever see the money.What should I do about someone who sent money through the mail??
you'll never see that money

you picture will probalby be uploaded to server royalty free all over the place
Your suspicion is correct about the post office crews to might found the money and keep it.second , the issue of been against the law to send cash money in the mail., third, is suspicious that this type of organizers pay out in cash given the fact that they still would have to report such pay out to to our well respect it I.R.S, so the whole thing sounds to dirty...my sugestion, contact this person and ask the prize to be only paid with a check, if arguement develops is your decision to threat with court call even in reality you might no want to waste your time for 150.00 ohh remenber also friend if you get paid w/check you'll be liable for taxation while cash is kind of tax free.