Before utilizing a plagiarism detection tool, please be aware of its policies with respect to the use and storage of your work. Too many plagiarism detectors maintain an internal database of all submissions made to them permanently, thereby classifying every new submission of the same material, even by different authors, as a "match".

For example,Quetext is an example of an academic tool that will not save your submitted content to a public or private database once it has been checked. By utilizing this service, you ensure that your original submission will not be available to be viewed by researchers or criminals, as well as anyone else who may have submitted the same original content in the future.

You should review each tool’s privacy policy prior to submitting your document; you will generally find information here on how long they intend to keep your submission (if at all), whether it will be included in their databases, and whether they will share your submissions with third parties. If you are unable to quickly locate this information, it may be an indicator that you will not want to use the evaluation service you are considering at all.