Any action that may result in a conflict of interest must be fully disclosed. When objectivity and effectiveness cannot be maintained, the activity should be avoided or discontinued.
Proper authorship representation is generally a matter for the involved parties to resolve.
Duplicate submission abuses the resources of all affected journals, including the valuable time of editors, reviewers and staff and is unprofessional and unacceptable.
Any incidence of fabrication or misrepresentation to be an extremely serious breach of professional conduct, with potentially severe ethical and legal consequences.