In a flow, will using a “List Update” action to adding existing profiles (with DOI set at true or not) to a new list (that is set/checked to require DOI) require them to double opt-in? Again? Every time? Will it trigger an confirmation email?
When you use a "List Update" action in Klaviyo to add existing profiles to a new list that requires Double Opt-In (DOI), it will not trigger a confirmation email if the DOI setting is already set to true for those profiles. Klaviyo recognizes that they have already confirmed their subscription and won't require them to double opt-in again.
However, if the DOI setting is set to false for those profiles, they will need to go through the double opt-in process again and receive a confirmation email.
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