Hi everyone,
I’m facing a recurring issue with a Lead Ad campaign managed through the Meta/Klaviyo integration, and I’m hoping someone here might have insights or solutions.

I’ve created a custom audience based on an email list in Klaviyo and excluded this audience from the campaign on Meta. The goal is to show the ad only to users who are not already subscribed. However, I’ve noticed that some users, who are clearly already subscribed, are still able to see and interact with the Lead Ad form, ultimately re-subscribing to the list. This issue is identical across three different accounts, so it doesn’t appear to be an isolated case.

I’ve reached out to support, but unfortunately, neither platform has been able to assist. Meta redirected me to Klaviyo, and Klaviyo pointed back to Meta, leaving me without a resolution.

To clarify:

• This is not a case of delayed synchronization, as some of the original subscriptions were made months before the Lead Ads were launched.
• This is also not an integration issue, as everything appears to be working correctly.
• The custom audience of subscribed users was excluded properly from the Meta ad campaign.

This issue is critical because I’m essentially paying for leads that I already had.

Has anyone else encountered this problem or found a workaround? It’s frustrating to be stuck without clear support from either platform.

Thank you in advance for your insights!