Editors are guided by the journal's editorial board policies and are limited by applicable legal requirements regarding defamation, copyright infringement, double publishing, and plagiarism. Published articles will remain as they are, as much as possible, and unaltered. However, under certain circumstances, situations may arise where published articles must be subsequently withdrawn or even deleted. Such actions should not be taken except in exceptional circumstances. Withdrawal of published articles can be initiated by journal editors, authors and/or their institutions. In some cases, the retraction should be accompanied by an apology for previous mistakes and/or expressions of gratitude to those who explained the mistake to the author. The retraction of published scientific articles should be accompanied by a statement that the original article should not be published and that the data and results should not be used as a basis for future research.

Article Withdrawal

This may happen if the original version of the article contains an error or was accidentally sent twice to both JMETP and/or a different publisher. It may also occur due to an infringements of scientific ethics code, such as double submission, allegations of misrepresentation, plagiarism, self-plagiarism, use of fraudulent data, or the like. Articles that comply with the Code of Ethics Infringements may be withdrawn from the article, with the knowledge of the author, together with a withdrawal letter sent to the JMETP editorial board.

Article Retraction

If an article is found an infringements scientific ethics, such as double submission, allegations of wrongdoing, plagiarism, use of fraudulent data, fake authors, or the like, a withdrawal will be made. Also, a retraction will be used to correct errors in the submission or publication. Retraction of an article by the author or editor on the recommendation of JMETP's editors. There are various forms of withdrawals performed by JMETP, namely:

* If an infringement of scientific ethical code is indicated before the publication of the article, the editor returns the article to the author, along with a withdrawal letter from the Editor-in-Chief

* If infringements of the scientific code of ethics are noted after the article is published, there are several mechanisms that can occur: The online article is preceded by a screen with a retraction note. The link to this screen is resolved; the reader can then move on to the article itself, The original article is retained unchanged save for a watermark on the .pdf indicating on each page that it is “retracted.”, The PDF version of the document is removed.

Article Removal and Legal Limitations

In an extremely limited number of cases, it may be necessary to remove an article from the online database of JMETP. This will only occur where the article is clearly defamatory, hoax, infringes others’ legal rights, a court order, and endangering state security. In these circumstances, while the metadata (Title and Authors) will be retained, the text will be replaced with a screen indicating the article has been removed for legal reasons.

Replacement of Article

The authors of the original article may wish to withdraw the erroneous original and replace it with a corrected version, where the article could pose a serious risk if considered. In these cases, withdrawal procedures will be followed, with the difference that the database retraction notice publishes a link to the corrected republished article and a history of the document.