If you know that the articles you are given to write belong to students or gentlemen who had to write these articles themselves, but they will write the articles through you and attribute them to you. ٬ So it is necessary to refrain from working for such people. If you are stuck in work and find out no option to get rid of your research work. Just stop being worried and try out some expert assignment help. But if you do not know the purpose for which the author of the article is writing, then it is permissible for you to write an article / essay containing legitimate articles.