A few days ago I started to notice that a site that had done very well for me was not getting and sales. It had been a big producer and I know that pattern for the last few months had been steady. When I went to my domain I noticed a message from the ISP that said this site was no longer in service. With a quick phone call I called the ISP and found out that since a used a brand name in the domain the trademark owner had claimed the domain. The point is I am not going to dispute that they legally do own the name in question, but it was part of a group of words. It also helped describe what was being sold on the site. When I got this domain I was actually surprised no one else had registered it including the trademark owner. In the end the site made a constant profit for about 6 months. The actual site can be rebuilt and re branded. The only thing is that the SEO that the site had built in the last 6 months are gone. Lesson learned is if you plan on building a site and spending time and money on it, make sure no one can just take your domain away.