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): I'm sysop on pt.wikt; I suspect these three users are the same person, an old vandal that has plagued pt.wikt in the past. If confirmed, please also list other current accounts belonging to the same person. I would like to block them all. Thanks. —The preceding unsigned comment was added by ValJor (talk) 17:28, 24 August 2015 (UTC)
@ValJor: Do you have a list of recent confirmed sockpuppets so, in case we accept this request, we can compare? Best regards. —MarcoAurelio 11:33, 26 August 2015 (UTC)
Not recent, no. The last time he attacked pt.wikt was in 2013
Reason(s): These users are absent for many months and not contributing in Wikipedia but whenever we start a discussion they come to oppose, its seems that all these users are Khangul's sock puppet accounts. —The preceding unsigned comment was added by 188.8.131.52 (talk) 00:43, 28 August 2015 (UTC)
Could you please elaborate why you think Khangul is behind this? I see that many other people are also opposing the last vote. Remember that CheckUser is not for fishing. —MarcoAurelio 22:47, 28 August 2015 (UTC)
he (Asif/Watanwal) is using the same language in his comments as Khangul used in other discussions.--184.108.40.206 00:34, 30 August 2015 (UTC)
Reason(s): Vote-stacking and personal attacks. This IP has previously used against one other et.wiki admin, Pikne, who Ahsoous has repetitively attacked and called for removal of his admin rights (example). Comment has information, that is known to only few persons (including Ahsoous) and it makes bold accusations. Making sure, that this IP isn't related to him would help to stabilize the local communication and stop more mud-slinging taking place before it escalates. Kruusamägi (talk) 21:57, 28 August 2015 (UTC)
Kruusamägi Since the user has 50k edits and is a sysop on etwiki, could you notify the local community (village pump, sysops' noticeboard, etc.) of your request? Elfix 20:39, 30 August 2015 (UTC)
Technically, thous comments in question are already in the village pump. I'd make the question there, even thou I don't see this as a very suitable place, as that might fuel thous nasty comments, that should not be there in the first place. Kruusamägi (talk) 21:13, 30 August 2015 (UTC)