This is a guide to reporting users to Wikipedia:Administrator intervention against vandalism (shortcuts: WP:AIAV, and WP:AIV). This guide is intended to prevent invalid reports that needlessly take up administrators' time, thereby allowing vandals more time to cause havoc before being blocked.

First, read the policy at Wikipedia:Vandalism and Wikipedia:Spam. Administrator intervention against vandalism is for reporting users currently engaging in persistent, clear vandalism or spamming. See the section "When reporting at AIV is not appropriate" for handling common incidents that should not be reported here.

Report only clear violations that do not require discussion or detailed explanations. If there is a reasonable chance that something may not be vandalism, it probably should be reported elsewhere, or not at all.

Vandals should always receive enough warnings before being reported unless they are vandalism-only accounts. What constitutes "enough" is left to your best judgment. Consider the user's past edits, warnings and blocks, the severity of their offense, the likelihood that their edit(s) could have been made in error or otherwise in good faith, and the type of user in question (IP addresses may be shared or dynamic, and old warnings could be irrelevant to the current situation).

Blocking is meant to be preventive, not punitive. Therefore, the user must show a strong likelihood of making further disruptive edits despite warnings and being informed of the blocking policy. Always give a final warning, and report only if the vandal has vandalized at least once after that. (A final warning is a "level 4" warning, usually {{uw-vandalism4}} or, in more extreme cases, {{uw-vandalism4im}}.) Administrators are likely to remove your report if they feel that the vandal has been insufficiently warned or has stopped after the final warning.

All reports should be placed at the bottom of the "User-reported" section of Wikipedia:Administrator intervention against vandalism, using one of the formats described below.

To report a user, you should use the {{vandal}} template. Your report should look something like:
*{{vandal|Example user}} concise reason e.g. vandalised past 4th warning. ~~~~
This will appear as

• Example user (talk · contribs · deleted contribs · nuke contribs · logs · filter log · block user · block log) concise reason e.g. vandalised past 4th warning. James086 13:11, 13 March 2007 (UTC)[reply]

Minor caveat: if the username has an equals sign (=) in it, you'll need to use {{vandal|1=Username}}. Don't worry too much about broken reports, though!

Unregistered users' contributions are logged by their IP addresses so they may be traced to check whether it is a shared IP (for example, a school). Reporting is the same, except with a different template ({{IPvandal}}) that has a few extra links:
*{{IPvandal|127.0.0.1}} concise reason e.g. vandalised past 4th warning. ~~~~
Which will appear as

• 127.0.0.1 (talk · contribs · deleted contribs · filter log · WHOIS · RDNS · RBLs · http · block user · block log) concise reason e.g. vandalised past 4th warning. James086 13:11, 13 March 2007 (UTC)[reply]

• Any vandal who hasn't been warned properly should not be reported, except for egregious cases.
• Violations of the three-revert rule should be reported to Wikipedia:Administrators' noticeboard/3RR
• If you suspect someone of sockpuppetry, file a report at Wikipedia:Sockpuppet investigations. Obvious and malicious sockpuppets engaging in vandalism may be reported to AIV. A link to the sockpuppetry report should be included in the reason for reporting.
• Usernames that clearly violate username policy should be reported at Wikipedia:Usernames for administrator attention.
• Do not report edit wars or other disruptive behavior that doesn't fit the description at Wikipedia:Vandalism. These can instead be reported to the administrators' noticeboard or its incidents subpage. AIV deals mainly with obviously malicious edits that require no discussion; complex cases should usually be referred to other boards.

If you reported a user or IP address to administrator intervention against vandalism and they weren't blocked, you should first check the page history; most administrators explain in their edit summary why they are removing an entry without blocking it. If no reason is given, you can (politely!) ask the administrator who removed the report from the page. Some of the more common reasons are listed below:

• The user hasn't been warned sufficiently.
• The user stopped making malicious edits since the final warning, especially if it was an IP address.
• The administrator deems the warnings inappropriate—for example, in the case of a content dispute.
• If it is an IP address, it may be shared; blocking could affect many users at once. Administrators are reluctant to block such IPs because doing so may cause collateral damage, especially in the case of sensitive IP addresses.
• You haven't used the appropriate template, and the bots removed the report as a comment.

Also:

• If administrators don't act on reports within 4-8 hours, the reports are considered stale and are removed. If this happens you'll need to resubmit your report.

• User:Ritchie333/Plain and simple guide to vandalism