Userboxes are sometimes deleted by administrators if there are thought to be valid reasons for their removal from Wikipedia. However, some userboxes may be inappropriately deleted. Wikipedia:Deletion review/Userbox debates considers appeals to restore userboxes that have been deleted. It also considers disputed decisions made in deletion-related fora. Before using the Review, please read Wikipedia:Deletion policy and Wikipedia:Undeletion policy.
Category:User undeletion lists a number of administrators who are prepared to honour good faith requests for the restoration of deleted content to your user space, for example if you want to work up a more encyclopaedic article. This does not require deletion review, you can ask one of them directly (or post a request at the administrators' noticeboard).
Userbox debates Deletion Review is the process to be used by all editors, including administrators, who wish to challenge the outcome of any deletion debate or a speedy deletion unless:
They are able to resolve the issue in discussion with the administrator (or other editor) in question (this should be attempted first - courteously invite the deleting admin to take a second look);
In the most exceptional cases, posting a message to WP:AN/I may be more appropriate instead. Rapid correctional action can then be taken if the ensuing discussion makes clear it should be.
An administrator (or other editor) is correcting a mistake of their own, or has agreed to amend their decision after the kind of discussion mentioned above.
Deletion Review is also to be used if significant new information has come to light since a deletion and the information in the deleted article would be useful to write a new article.
This process should not be used simply because you disagree with a deletion debate's reasoning — but instead if you think the debate was interpreted incorrectly by the closer or have some information pertaining to the debate that did not receive an airing during the AfD debate (perhaps because the information was not available at that time). This page is about process, not about content, although in some cases it may involve reviewing content.
