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): The first account has edits in the same articles the second has had (I have listed some of them above). The second account has been blocked before and I am afraid if the user has abused socking to evade block. Since the accounts belongs to a banned user, please specify all of his/her Sockpuppets too if they were the same. Thanks --Kazemita1 (talk) 20:09, 11 July 2015 (UTC)
Sorry but you copied my previous requests even without one minor change! I am a sysop in fawiki and as far as I know, the user has not been banned and this request is not legitimate based on the above facts. ● MehranDebate 02:40, 12 July 2015 (UTC)
Apologies for the copyright violation! But user:Seiavoshy was editting during the time user:Maahmaah was blocked. As for the original banned user, I am talking about the notorious user:Truth Seeker. who has abundance of socks--Kazemita1 (talk) 07:00, 12 July 2015 (UTC)
All right, that would be an acceptable reason, however I did not understand the relationship between Truthseeker and the accounts. ● MehranDebate 07:28, 12 July 2015 (UTC)
Closed Please take discussion back to local wiki to determine the need and value of a checkuser. — billinghurstsDrewth 13:37, 29 July 2015 (UTC)
@billinghurst: The consensus in the above discussion was that the request is legitimate. Can you do the checkuser? Because right after this request, both of the users announced retirement Seiavoshy, Maahmaah; but because of the delay in the process, they started their activity again. Best, Taha (talk) 03:24, 30 July 2015 (UTC)
Unrelated between the two accounts. I do see a relationship between Maahmaah and Basp1, though the latter account only edited for a month.
To note that if you are going to start using the "Truth Seeker" reasoning then we would be expecting to see editing in that style mentioned for the check, so we have some evidence that it is the user. I think that checks like this should be proposed with admins at faWP first. — billinghurstsDrewth 11:20, 30 July 2015 (UTC)