While writing a dissertation is a time-consuming process, it takes sleepless nights to gather the data, making a knowledge map, referencing, proof-reading, forming hypotheses and testing them with the reliable statistical method to finish. There are some companies which write your dissertation, and you can submit them as your original work without even changing a word. This is what happens in Iran today.
In a few months ago, Iranian Research Institute for Information Science and Technology (IRANDOC) decided to run a plagiarism checker to require the students to submit their works and check to see if their work is original or not. Based on the IRANDOC, the plagiarism checker prevents students from buying a pre-written dissertation, but these private institutes write your thesis as a paid service.