Hey @miaraffiusa 

Hope to provide some clarity around double opt-in for you and the rest of the Klaviyo Community.

There is no need to upgrade your account (unless you’re crushing your marketing strategy ). Each list that your signup forms are connected to can be single or double opt-in. You can change these settings by navigating to your List & Segment tab in your Klaviyo dashboard and then selecting the list your signup form are pointing to. Once in the list click on Settings 

Within the settings there are Opt-in Process settings. You can change this to single opt-in. 

This will remove the need for the confirmation step on your signup forms! I hope this helped make this process easier for you and the rest of the Klaviyo Community!