Starting August 2006 we have launched a module that checks any custom paper that we produce for plagiarism, be it a dissertation, coursework, thesis or a simple 5-paragraph essay. We utilize latest technologies of web search to detect plagiarized materials and guarantee 100% authentic custom written research papers. The procedure is as follows: whenever the writer uploads a completed paper to the control panel, our system starts an automatic plagiarism check in the background. The paper is separated into small blocks, called patterns. Then the system performs a web search by utilizing a so-called Rabin-Karp algorithm of string text search, thus giving the most precise results, (it even includes sources where the parts of the paper were copied from). This technology was invented back in 1987, and we found it to be the most adequate solution for our clients" needs.