There are many options for how to complete your custom paper. You can buy a paper online, find someone to write it for you, request an extension with the professor, or submit your work as-is. The important thing is that you communicate with your professor about how they would like to receive your final draft so that they can complete it on time and you can avoid any delays in the process of getting credit for the work.
Initially, students were limited primarily to buying papers online because of limited access and personal experience reports of unsatisfactory content produced by university writers. However, websites like Pro-Papers Network have shown that purchasing papers online is not always worth it since there are so many quality plagiarism detection tools available now.