Create Single and Double Opt-In Forms for MailChimp and Campaign Monitor Integrations

Easy mailing list and newsletter sign up forms are only a couple of clicks away.

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By: Tim Sabat

Previously, we added real-time notifications to our growing family of integration features. Since then, we’ve sent over 100,000 email addresses via the new platform to Campaign Monitor and MailChimp. To keep up the momentum and help make using those services even easier, we are excited to announce the ability to create Single Opt-In and Double Opt-In mailing list sign-up forms in Wufoo for those two integrations.


First, let’s do a terminology overview. Because you want to avoid setting up a situation where users feel like they were duped into joining your mailing list, Opt-In features allow you to avoid accumulating bad karma by giving your users the chance to choose whether or not to be added to a list.

If you’d like to do some more reading about the value of Opt-In options and the pros and cons of each, the guys at MailChimp have provided a great write-up describing them in detail.

MailChimp Opt-In Options

Single Opt-In for both MailChimp and Campaign Monitor can be set up directly in the Wufoo interface in the Notification Settings. All you have to do is create a form with a checkbox field and then select that field for basing whether the user accepts being added to the mailing list under Only Send If Choice Is Ticked.

To set up a Double Opt-In form for MailChimp, it’s very easy. Just tick the Send Opt-In Email setting in the integration settings and it will send a verification email to the user with a link to verify that they really want it. For Campaign Monitor, because Double Opt-In is set up at the list level, you’ll have to log in to their service and set it up via their interface to make it work. You can learn about how to do that in our Campaign Monitor Integration Docs.

For more information about these individual integrations, check out our MailChimp and Campaign Monitor documentation.