Home›Browse›opt-in email🌐EnglishEnglishDeutschFrançaisNederlandsPortuguêsSvenska한국어中文日本語EntityQ1137616· pop 8· linked from 41 articlesopt-in emailSign in to savemechanism whereby one party verifies the purported identity of another partyWikidata factsSubclass ofruleShow 1 more factopposite ofopt-outSources (2)wikidata.orgdocs.openalex.orgvia Wikidata · CC0Available in 8 languagesFrançaisDeutsch日本語PortuguêsNederlandsSvenska한국어via Wikidata sitelinks · CC0