# Marking issues or pull requests as a duplicate

Mark an issue or pull request as a duplicate to track similar issues or pull requests together and remove unnecessary burden for both maintainers and collaborators.

For a "marked as duplicate" timeline event to appear, the user who creates the duplicate reference comment must have write access to the repository where they create the comment.

## Marking duplicates

To mark an issue or pull request as a duplicate, type "Duplicate of" followed by an issue or pull request number in the body of a new comment.

You can also use the GitHub-provided saved replies, "Duplicate issue" or "Duplicate pull request." For more information, see [About saved replies](/en/get-started/writing-on-github/working-with-saved-replies/about-saved-replies).

![Screenshot of an issue timeline, with a comment by octocat, "Duplicate of #97", and a timeline event "octocat marked this as a duplicate of #97."](/assets/images/help/issues/duplicate-issue-syntax.png)

## Unmarking duplicates

You can unmark duplicate issues and pull requests by clicking **Undo** in the timeline. This will add a new timeline event, indicating that the issue or pull request was unmarked.

![Screenshot of an issue timeline. To the right of a timeline event where the issue was marked as a duplicate, an "Undo" button is outlined in orange.](/assets/images/help/issues/unmark-duplicate-issue-button.png)