Make sure you have a good reason for the check. It will only be accepted to counter vandalism or disruption to Wikimedia wikis. Valid reasons include needing a block of the underlying IP or IP range, disruptive sockpuppetry, vote-stacking, and similar disruption where the technical evidence from running a check would prevent or reduce further disruption.
Be specific in your reasons. Ambiguous or insufficient reasons will cause delays. Explain the disruption and why you believe the accounts are related, ideally using diff links or other evidence.
Make sure there are no local checkusers or policies.
Reason(s): Tubus voted in favor of MrArifnajafov in voting for removal of his admin flag. And according to rules it is forbidden for candidates to vote for themselves. I ask you as a bureaucrat of azwiki.--Sortilegus (talk) 15:03, 30 September 2014 (UTC)
Why do you think they are the same person? Ruslik (talk) 19:02, 30 September 2014 (UTC)
Dear Ruslik, first of all because Tubus started to edit in Wikipedia since MrArifnajafov stopped his activity more than one year ago. In last few days while voting is ongoing MrArifnajafov started to edit, but Tubus is not active on the same days. Also their manner of editing and communication looks similar. Both of them are making some mistakes in articles specific for them. We don't know really, but MrArifnajafov says that he is living in Germany. Maybe it also can help you in identification of sock. Voting ended one hour ago and as a result MrArifnajafov keeps sysop flag by 1 vote difference. So this request is very important to come to a final decision. I'm an administrator in az-wiki. Thank you in advance.--Wertuose (talk) 19:51, 1 October 2014 (UTC)
I agree with Wertuose in all points. And want to inform you that Tubus's vote decides the fate of admin flag.--Sortilegus (talk) 20:06, 1 October 2014 (UTC)
Reason(s): The accounts (except the first one) has been created recently. They all appeared suddenly in the above AfD and all unanimously with a joint rationale for deletion of the article. They look ducks/doppelgangers to me and I will block them soon. But this request is for the first user, which has some interests (or perhaps CoI) in the article to be kept and just want to be sure if the accounts belongs to him. Thanks in advance. MehranDebate 10:40, 10 October 2014 (UTC)
Reason(s): Same edit patterns, interest in the same subject and repeatedly putting self-published sources to articles. I wonder if they are the same person. ~ NahidTalk 09:25, 14 October 2014 (UTC)
There is no need to know whether they are the same person to manage poor or abusive editing. We need a reason that effects how we manage the problems and how knowing this information better informs (y)our actions. — billinghurstsDrewth 14:53, 14 October 2014 (UTC)
Got your point. Will deal the problem locally. Thank you for your time ~ NahidTalk 19:14, 14 October 2014 (UTC)
Reason(s): User:پارسا آملی had been blocked indefinitely due to his consecutive Sockpuppetry and his last known SP is User:Alireza.fzd. Recently we decided to give him a chance and put a topic ban for him instead of blocking his accounts. But before that, there is another suspicious account (fa:User:Perzhi) editing now and he denies to be himself. They have similar manner of editing and similar field of interest. The topic ban may be revoked if they are the same. Also please specify the other SPs if there are. Thanks in advance. MehranDebate 06:01, 18 October 2014 (UTC)
Unrelated Last time that I can see an evident account shared is early September, and I am not even certain that it edited, and I didn't chase further. — billinghurstsDrewth 10:29, 18 October 2014 (UTC)