Authorship criteria define who may be listed as an author on a research paper and who may not. The most widely adopted standard comes from the International Committee of Medical Journal Editors (ICMJE), which sets out four conditions that must all be satisfied. Getting authorship right is both an ethical obligation and a practical necessity: disputes over who is named, and in what order, are among the most common and most bitter conflicts in research, and most journals now require authors to confirm they meet the criteria at submission.
This guide explains the ICMJE authorship conditions, the conventions for author order, the abuses to avoid, and how to prevent and resolve disputes.
Under the ICMJE definition, an author must meet all four of the following:
- Substantial contribution to the conception or design of the work, or the acquisition, analysis, or interpretation of data.
- Drafting the work or revising it critically for important intellectual content.
- Final approval of the version to be published.
- Accountability for all aspects of the work, including ensuring that questions about accuracy or integrity are investigated and resolved.
The crucial point is that contribution alone is not sufficient. Someone who collected data but had no part in drafting, approving, or standing behind the work does not qualify as an author under this standard. They should instead be named in the acknowledgements. This is why "I did the lab work, so I am an author" is not automatically true, a frequent source of confusion among early-career researchers.
Contributorship and CRediT
Because the binary author-or-not model hides who actually did what, many journals now use contributorship statements built on the CRediT taxonomy (Contributor Roles Taxonomy). CRediT records specific roles, conceptualisation, methodology, formal analysis, writing, supervision, and more, so the published paper states each person's exact contribution. This transparency reduces disputes and gives proper credit for work, such as statistical analysis or data curation, that might otherwise be invisible. Our biostatistics and statistical consulting teams, for instance, are routinely credited through CRediT roles when their analysis is central to a study.
Author order carries meaning, and the conventions vary by discipline. In much of the biomedical and natural sciences, the first author did the most work and often led the writing, while the last author is the senior or supervising researcher who secured funding and oversaw the project. Middle positions are generally less significant. Some fields, by contrast, list authors alphabetically. The corresponding author, who may be in any position, takes responsibility for communication with the journal, handling submission, revisions, and post-publication queries. Because these positions affect how credit is read by hiring and promotion committees, order should be agreed by everyone and recorded, ideally in writing, early in the project.
The Abuses: Gift and Ghost Authorship
Two practices breach authorship ethics from opposite directions:
- Gift or honorary authorship lists someone who did not genuinely contribute, often a department head or a senior figure added out of deference. It inflates the byline and misrepresents responsibility.
- Ghost authorship omits someone who did contribute, most often a professional writer or an industry employee whose involvement is hidden. This is particularly serious where it conceals a commercial interest in the findings.
Both distort the record of who is responsible for the work, which is precisely what authorship is meant to certify. Our broader guide to publication ethics places these abuses within the wider integrity framework.
Preventing and Resolving Disputes
Most authorship conflicts are preventable. The reliable safeguards are:
- Discuss authorship early, before results create incentives, and revisit it as roles evolve.
- Record contributions using CRediT or an equivalent so credit is explicit.
- Name the corresponding author and confirm everyone agrees the order.
When a dispute does arise, journals and institutions follow COPE guidance, and the resolution turns on documented evidence of who did what, which is far easier to produce if roles were agreed at the outset. For teams preparing a major submission, our manuscript editing service helps structure authorship and contributorship statements to journal requirements, so the byline reflects the work accurately and withstands scrutiny.
Clear authorship is ultimately a matter of honesty about responsibility. Agree it early, record it precisely, and the most common dispute in research becomes a non-issue.
The Corresponding Author and Changes to the Byline
Two practical responsibilities sit outside the four ICMJE criteria but cause frequent problems. The first is the role of the corresponding author, who acts as the point of contact for the journal during submission and peer review and after publication for questions, data requests, and corrections. This is an administrative duty, not a higher tier of authorship, and it does not by itself confer or remove credit. The second is changes to authorship after submission. Adding, removing, or reordering authors after a manuscript is under review is treated by most journals as a serious matter that requires a signed statement from every author, including the person being added or removed, explaining the reason. Editors scrutinise late changes because they can signal gift authorship or a dispute that was never resolved. The safeguard is to agree the full author list and order in writing before you submit, ideally when you register the protocol, and to revisit it only through a documented, unanimous decision. Where a disagreement cannot be settled internally, the institution, not the journal, is usually the body that adjudicates, a point we expand on in our publication ethics guide.