This is a template alias for <code>{{[[template:sockpuppet|sockpuppet]]|username|<nowiki>[[{{highssp|1=username]]</nowiki>}}</code> (see [[template:sockpuppet|documentation]]).
A case must have been created to report the sockpuppeteer (puppetmaster), otherwise the evidence link in this warning box will be red, indicating that the page does not exist. Complete directions for creating the case page, posting this notice, and notifying the suspected sockpuppeteer of the accusation, are at [[WP:SSP|Wikipedia:Suspected sock puppets]].