BTC being very valuable it attracts a lot of scammers. Thankfully due to the lack of regulation and really no insurance it has made the BTC community pretty intelligent. I've tracked down a few scammers and here is how I do it.
First I check out the website. For example cryoniks is a notable scam. You can go to their website search for contact information and try to figure out where they are located. If I can get an address I will try and look it up on google maps. If there are any front men I do a google search for them. Recently I found that one scammer had published a book under the author's name Dan Brown (a notable author for writing the da vinci code). The book is on Amazon for sale and the reviews were deplorable.
Another good source is to do a whois lookup. You can do this by going to networksolutions (probably the most respectable domain domain registrar there is. There you can find the whois option and do a search on the domain. Here you might get some names, email addresses, physical addresses, and telephone numbers. Take this information and google it. I was able to track the owner of the cryoniks domain back to a kickstarter scam a couple of years ago. They tried to sell these encrypted USB drives that needed a physical combination to unlock.
Also, with the whois look up note when the domain was registered. One of the scams that I tracked down was created 3 days prior and the site was developed with a lot of cookie cutter tools. This made me very weary of them because BTC is still a new technology and while they have a website AFAIK they would need a real developer to create an order system that would handle BTC transactions.
Do research on what they are proposing. For cryoniks the product they are claiming to be making is physically impossible to make with today's technology. The cooling device they claim to be putting into their miner is honestly a more significant technological development then the 1TH BTC Miner they are selling.
As a general rule if you're going to give BTC to an organization that you're unsure about their authenticity don't give them any more BTC then you're willing to lose. There was one possible scam recently that was selling ammo online. It all looked pretty legitimate, but apparently someone tried them out and got burned. Sadly for him he gave them several hundred dollars on a large order. Even though I was strongly considering giving them a shot myself I was only willing to risk about 20 bucks on a small order to test them out. Even if they did come through with the small order I wasn't going to fully trust them fearing some sort of long con.
Anyway I hope this you've found this information to be useful. Happy bitcoining
