What should we do if someone copy our articles,our work?

As a webmaster, we are always try to create a unique content for our sites, but unfortunately, there are many webmasters does not feel ashamed to copy our work, our articles and put them exactly on their websites without any citation.

Recently, I have checked some of my old articles which I wrote long time ago. There are many versions of them on the internet right now. That makes me feel sad about it. We took a lot of time to find information and wrote those articles, but others just copied exactly our work and put them on their sites.

I just ask myself why they do that. They do it because of money, they want to use it on their site and put ads on it to make money or they just collect that information and put them on their sites to use it as a reference for themselves. Either way, they should put the source to that original article. But they do not. What’s ashamed!

So, what should we do if this happen to us?

Step1: We should check if someone uses our articles on their sites. I do not know any tool can do this at this time. According to my search on Google, I found http://www.copyscape.com/. With this tool, it can help you to search for sites that use your articles. Even, it is not perfect, but anyway, it can help you a portion of work. If you want to use the full version of this, you must pay them.

Step 2: When we find the site that is using our articles, the next step is to contact them and ask them to remove those articles or put the source to that original article.

Step 3: Sending a letter does not help, the next step is to send a DMCA complaint to the host of the site.

What do you think about this matter? Does this help? Do you have any idea on this problem?