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.
@Bookvaedina: if you'll fear a vote was influenced (or is being influenced) by an abuse of multiple accounts feel free to ask a check, but we usually don't make preventive checks. --Vituzzu (talk) 20:17, 17 February 2017 (UTC)
Шухрат Саъдиев@ tg.wikitionary and tg.wikibooks
Reason(s): Discussion: tg.wikitionary and tg.wikibooks Users are blocked in tg.wikipedia and under one user IP and voting in different projects, thus violating the requirements of the administrator of the election procedure.
"Since we have no local CheckUser, I ask you to clarify, the IP user Jaloliddin Madaminov and Ҳусаинов. Thanks.--Шухрат Саъдиев (talk) 05:48, 12 February 2017 (UTC)
My name is a Jaloliddin my surname is Madaminov. I am a incomprehension Ҳусайнов. Jaloliddin Madaminov (talk) 08:42, 14 February 2017 (UTC).