IDAHO FALLS - If you get a check in the mail, and it seems too good to be true, it probably is. It's called the secret shopper deal.

"I had been doing online surveys so that's the only way i think they got my name and address," says Debi Walker.

Debi Walker got this hand written envelope in the mail.

"I was like oh wow who sent me email," says Walker.

That should be the first clue, that something is fishy.

"It's a plain white envelope, look for that, no return address those are important things," says Donna Oe, President of Better Business Bureau.

Another clue, is where it's coming from.

"A lot of our scams come from Canada, and we're talking u.s. companies, put two and two together, it's not matching up," says Oe.

Debi noticed all these clues, she even went ahead and researched if to see if the bank of Landisburg even exists. In this case it does, but that doesn't make it legit.

"They do use real banks, you bet they do," says Oe.

It's nothing new, just like this scam. The mystery shopper scam is a popular one. Here's how it works, while you're out shopping, you're rating the service.

"Basically evaluate the effectiveness sand efficiency and all that of a particular establishment," says Walker.

"They're using names like Walmart and Gap, Payless Shoes, Best Buy, Old Navy, all names that we know," says Oe.

Then there's this nice chunk of change.

"It's a cashiers check for $4, 995... $1,600 goes to a Western Union transfer... $2, 887 goes to a money gram transfer, my salary out of it is $250 dollars," says Walker.

"This is your money that they're taking," says Oe.

"I don't want to be out 5 thousand dollars," says Walker.

On top of that, this official looking check, under some light, doesn't make the cut.

"There are no water marks, one thing," says Oe.

But just for fun, we gave the number on the letter a call.

"Surprise, surprise, there was no answer," says Walker.

If we had gotten through.

"Ask them a lot of questions, the scammers don't like that they are caught off guard, or they'll just hang up," says Oe.

Just remember, chances of being paid before you've actually done any work, are pretty slim.