The principles, practices and policies that ensure published work can be trusted as a reliable source. The Committee on Publication Ethics (COPE 2017) has developed a taxonomy of publication ethics issues. These issues may occur at any stage of the publication lifecycle from author through editor to publisher. They might also arise from the work of reviewers, translators and funders. Some relate to a particular role in the process, such as ghost and guest Authorship, Fabrication, Falsification and Plagiarism or Predatory Publishing. Others, such as Conflicts of Interest, may occur at several stages. Issues identified in publication ethics may lead to correction of the published record as well as investigation of the circumstances under which the issue arose. Changes in the publishing industry (Open Access, pre-print publishing and post-publication review) will necessitate ethical responses.