Email verify field for join

 Some wise guy keeps joining as gay couple . I'm not sure if it's missing for some reason or I just can't find it but could someone "PLEASE" tell me where the option is for e-mail verify that works with the "Join" page?
I know it's here, but I can't seem to find it. I've been looking for two days

Settings - moderation

You can also turn off 'couples' as an option if thats a problem.

Thank you very much daihlo,  It's not worded as I expected at all... Thanks again...    That ***hole has been doing this two or three times a day for a couple weeks.