When Authorship Goes Wrong: Why SIGCHI Conferences Freeze Author Lists and What That Means

Every year at conferences, the same painful situation occurs. A student or collaborator made a significant contribution to a paper, but their name was inadvertently omitted from the submission. When the mistake is discovered, the conference says that no changes are allowed. The result feels deeply unfair, especially in a community that publicly emphasizes inclusion, mentorship, and proper credit. How can a system that claims to value ethical research allow someone who did the work to be excluded from authorship?

To understand this, we must examine how authorship actually works in ACM publications. The answer is not found in a single rule, but in the interaction between conferences’ Calls for Papers, ACM’s authorship policy, and the submission time certification that binds authors and venues together. Only by understanding how these layers fit together does the logic behind frozen author lists become clear.

The Call for Papers is a binding contract

When a research team submits a paper to an ACM conference, they do not just upload a PDF. They also accept the Call for Papers, the submission rules of that venue, and ACM policies. For SIGCHI conferences, this is typically a checkbox with a text outlining the authors’ agreement; see an example text in the SIGCHI Submissions and Reviewing Policy. These rules define what authors are allowed to do and what the conference is allowed to enforce. By clicking submit, the authors enter into a contract with the venue, in which both sides agree to follow the published rules.

These conference rules do not exist in isolation. They operate under ACM policies, such as the Policy on Authorship, which acts as a higher-level framework. A conference cannot permit something that ACM policy forbids, but it can impose stricter procedural rules as long as they are consistent with ACM policy. This is why many conferences state explicitly that author lists are frozen at submission and cannot be changed later. That rule is not arbitrary. It is how the conference operationalizes ACM’s authorship policy in a way that is enforceable and auditable.

What ACM actually means by authorship

ACM’s Policy on Authorship is much stricter than many people realize. To be an author, all authors must fulfill the attributes quoted here:

Anyone listed as an author on an ACM submission must meet all the following criteria:

• They are an identifiable human being. Anonymous authorship is not permitted, although pseudonyms and/or pen names are permitted, provided accurate contact information is given to ACM. ACM does not currently permit collective authorship.
• They have made substantial intellectual contributions to some components of the original Work described in the manuscript, such as contributing to the conception, design, and analysis of the study reported on in the Work and participating in the drafting and/or revision of the manuscript.
• They take full responsibility for all content in the published Works.

As a result, it is possible that an author may be excluded from the list of authors during the submission process. This is what authors try to rectify after the submission deadline has passed.

However, the ACM Policy on Authorship continues, most importantly for the question of whether ACM allows authorship changes, to be: “They [all authors] are aware the manuscript has been submitted for publication to ACM.” This is therefore not only about who helped, but about who formally stands behind the manuscript that enters the scholarly record.

At submission time, all listed authors make a set of explicit statements to ACM. They confirm that they know the paper has been submitted, that they approve the version being reviewed, and that they agree to be held responsible for its integrity and compliance with policy. This turns authorship into a legal and ethical attestation, not just a credit line. The author list becomes part of a contract between the researchers and ACM about who is accountable for the work.

Submission time certification and author responsibility

This submission time certification is the cornerstone that holds the entire system together. The version of the paper that enters into peer review is the one that the listed authors approved and agreed to stand behind. Reviewers, chairs, and ACM rely on the fact that every named author endorsed that specific document. If problems later arise, these are the people who can be contacted, questioned, and held accountable.

A person who was not listed at submission did not make that certification to ACM. From the perspective of the reviewers, chairs, and ACM, there is no record that this person saw the final version, approved it, or agreed to be accountable for it. Even if they did so within the research team, that consent was never formally communicated through the submission process. As a result, they never entered into the submission time contract that defines authorship for this particular manuscript. This is why authorship cannot simply be extended later without breaking the underlying logic of responsibility.

Why author lists are frozen

From this perspective, frozen author lists follow directly. If the author list could be changed freely after submission, the submission time certification would become meaningless. People who never approved the reviewed version could be added or removed to avoid responsibility if something goes wrong. The conference would no longer know who actually stood behind the paper that was evaluated.

Freezing the author list is therefore not about being inflexible for its own sake. It is about preserving the integrity of the authorship contract. It ensures that the names on the paper correspond to the people who approved and took responsibility for the version that entered peer review. Without this, authorship would become negotiable after the fact, which would undermine both accountability and trust in the scholarly record.

The ethical collision

This is where the system becomes emotionally and ethically difficult. Sometimes a student or collaborator really did contribute before submission, but was accidentally left off the author list. From a moral perspective, they deserve authorship. From a procedural perspective, they cannot be added without falsifying the submission time certification that underpins the review process.

The system knowingly prioritizes the integrity of the scholarly record over perfect fairness in individual cases. That is a harsh trade-off, but it is deliberate. Without it, authorship would become vulnerable to pressure, politics, and strategic manipulation. Acknowledging this does not make the harm disappear, but it explains why these painful edge cases exist.

What’s next when an authorship mistake is discovered?

Once a missing author is discovered after submission, there are only two paths forward that remain ethically and procedurally valid.

The first option is to withdraw the paper. This resets the submission process, allowing the author list to be corrected so that all contributors can review, approve, and take responsibility for the manuscript. This produces a clean and fully ethical authorship record, but it also means losing the current review cycle and potentially the paper itself if it is not accepted again.

The second option is to proceed with the frozen author list and acknowledge the missing contributor explicitly. This does not give them formal authorship, but it does create a public and permanent record of their contribution. However, this option undoubtedly raises ethical questions. Especially if the power dynamics are not in favour of the forgotten author(s).

There is no third option that is both policy-compliant and ethically defensible. Quietly adding someone as an author after submission would misrepresent who approved and stood behind the reviewed manuscript. Quietly leaving them out would hide their contribution. Withdrawal or transparent acknowledgment are the only two “clean” choices.

Withdrawal is the only way to restore full authorship

There is only one way to give someone full authorship after an omission has occurred. The paper must be withdrawn, the author list corrected, and the work resubmitted so that all authors can read, approve, and take responsibility for the manuscript, which has to occur under ACM Policy on Authorship for every submission. This resets the submission time certification and restores a clean authorship record.

This option discards reviews, delays publication, and frequently harms researchers more than it benefits them. However, it is the only way to give all authors their deserved spot on the author list while complying with ethical and procedurally valid standards.

Why acknowledgments are an imperfect but legitimate solution

Using acknowledgments instead of authorship to correct an omission undoubtedly raises ethical questions, especially when power dynamics are unequal, and the forgotten contributor is a student or junior researcher. Being named in acknowledgments does not provide the same career credit, visibility, or protection as formal authorship; in such situations, the harm is real.

Acknowledgments are, therefore, an imperfect solution to authorship mistakes. They do not give someone the formal academic credit that comes with being listed as an author, and they do not make them accountable for the submitted manuscript. For people who genuinely deserved authorship, this is understandably painful. This option should therefore be considered very carefully. However, under a frozen author list (resulting from ACM policy), acknowledgments are the only mechanism the system still allows to record a contribution without falsifying the authorship record.

There is also a real downstream risk. Because acknowledgments are not part of the formal author list, they do not participate in automated conflict of interest detection, bibliographic databases, or authorship-based accountability systems. In principle, this creates a vulnerability: a malicious actor could attempt to conceal a conflicted contributor by relocating them from the author list to the acknowledgments. This is precisely why ACM defines ghost authorship as concealment intended to deceive.

That is not what happens when acknowledgments are used transparently under a frozen author list. ACM defines ghost authorship as hiding a real contributor in order to deceive the reader about who was behind the work. An acknowledgment that openly states that someone contributed to the design, analysis, or writing of a paper is a form of disclosure, not concealment. The reader is explicitly informed, even if automated systems cannot act on it. For that reason, transparent acknowledgments, used because authorship cannot be corrected procedurally, do not violate ACM’s prohibition on ghost authorship.

The formal appeals process

None of this is meant to be handled through private negotiation or quiet exceptions. SIGCHI and ACM provide a formal appeals process for disputes about submissions and reviews. Authors can appeal to the Associate Chair/Editors, then to the Track Chairs, then to the Program Chairs or the Editor-in-Chief, and finally to ACM itself.

This ladder exists so that conflicts, including authorship-related ones, can be reviewed transparently and on the record. If an author team believes a conference has misapplied its own rules or ACM policy, this is where the issue should be raised to increase awareness among all involved stakeholders. See SIGCHI Submissions and Reviewing Policy for the full details on the appeals process.

Closing

The authorship system in ACM conferences is not gentle, and it does not always produce outcomes that feel fair. But it is internally consistent. Authorship is not only about who helped. It is about who certified, approved, and took responsibility for a specific document that was submitted. Senior authors in particular should take this responsibility seriously by guiding authorship decisions early and helping junior collaborators navigate these rules. Once that is understood, frozen author lists stop looking arbitrary and start looking like the price we pay for a scholarly record that can actually be trusted.

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