This document discusses various publication ethics issues including duplicate publication, authorship, scientific misconduct, and conflicts of interest. It provides definitions and examples of these issues, noting that journals exist to enhance the scientific database but also other interests like profits. The document cites a study that found around 0.04% of papers involved plagiarism and 1.35% involved duplicate publication. It discusses best practices for authorship including determining order upfront and documenting responsibilities. Conflicts of interest can mislead readers and include financial, personal, political or academic interests. The Committee on Publication Ethics was founded to address integrity concerns in medical journal publishing.