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The wording is inconclusive, period. It simply doesn't address the case of offering your own sign in system as well as a 3rd party system. Anyone that claims otherwise is speculating unless they've gotten an official response from Apple. We've had a team review the language and they all agree it's inconclusive. Hopefully we'll get clarification before April of 2020 but if you need to know today I'd reach out to support requesting clarification: https://developer.apple.com/contact/func isSignInWithAppleRequired() -> Bool { switch (supportsCompanySignIn, supportsThirdPartySignIn) { case (true, true): // TODO case (false, true): return true case (true, false): return false case (false, false): return false } }