If you suspect sock puppetry by an administrator, or if you need to submit off-wiki evidence for some other reason, you must email the CheckUser team or the Arbitration Committee to open an investigation. Private information, emails, logs, and other sensitive evidence must not be posted on Wikipedia.
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Before opening an investigation, you need to have good reason to suspect sock puppetry.
Evidence is required. When you open the investigation, you must immediately provide evidence that the suspected sock puppets are connected. The evidence will need to include diffs of edits that suggest the accounts are connected. (This requirement is waived if the edits in question are deleted; in this case just provide the names of the articles that both have been editing.)
You must provide this evidence in a clear way. Vaguely worded submissions will not be investigated. You need to actually show why your suspicion that the accounts are connected is reasonable.
Investigations are conducted by an administrator, who will compare the accounts' behaviour and determine whether they are probably connected; this is a behavioural evidence investigation. Upon request, investigations can also be conducted by a CheckUser, who can look at the physical location of the accounts (and other technical data) in order to determine how likely it is they are connected; this is a technical evidence investigation.
How to open an investigation
To open an investigation (or case), enter the user name of the oldest account (the "sockmaster"), or the previous case name, in the box below, then click "Submit". Note: Do not include "User:" or any other commentary.
For example, if the case name is about User:John Doe or a prior case was at Wikipedia:Sockpuppet investigations/John Doe, then you should input John Doe in the box below.
You will then be taken to another page containing a form which you must complete in order to open the investigation. The process for opening an investigation is the same for re-opening an old case (that is to say, if a case under that name already exists) as for creating a new case. Again, do not include "User:" in any of the sock or ip fields.
If you also require a CheckUser to investigate, change |checkuser=no to |checkuser=yes in the edit box on the next page.
If you are an anonymous (IP address) editor, please click "show" to the right and use the box below
Use this section to request checkuser information relating to a situation that does not involve sock puppetry. You could use this section to request, for example:
Underlying IPs of an account, where the autoblock has expired or been ineffective.
Collateral damage checks for the informed hardblocking of IPs or ranges.
IP block exemption checks before granting IPBE (or to verify it is being used constructively).
For threats of harm (to self or others) you must e-mail emergencywikimedia.org (see the threats of harm page) and not use this page. Requests to investigate and confirm sockpuppetry should be listed in the sockpuppet section above, and not here (such requests will be summarily removed).
To make a request here, copy the following template and paste it to the end of this section (quick link to edit) – replacing "header" with an informative title, and adding underneath the template any relevant information – then sign using "~~~~", preview, and click "save".