Never. You should never be worried about the plagiarism issues in your dissertation. We have tools and systems that ensure dissertations that are completely free from any plagiarism issues. In fact, your work passes through multiple stages of quality checks. These quality checking stages compare the work done in the past, through online sources, and university repositories. We use Turnitin and Safe Assign software to verify the plagiarism. Some universities require that the plagiarism percentage is below 15%. However, our experts always strive to keep it below 5% or 10%. In some cases students get paper with 0% plagiarism.