There are two ways to disconnect Fraud Blocker from your Meta Ads account.
Option 1 - Disconnect our Fraud Blocker webapp entirely from your Facebook account
Follow these steps:
Delete our custom audience of bad IP addresses
Go to your audiences by going here (be sure to select your business account): https://adsmanager.facebook.com/adsmanager/audiences
Delete the "Fraud Blocker" audience
Then, disconnect our app
Select your personal Facebook Profile in the top right corner of the Facebook app or website.
Select "Settings & privacy."
Select "Settings."
Select "Business Integrations."
Select "Fraud Blocker."
Select "Remove."
Option 2 - Disconnect only your Ad Sets or Pixels from Fraud Blocker
Follow these steps:
Go to the Meta Ads "Set up" page at Fraud Blocker.
Select "Disconnect This Ad Set" and/or "Remove This Pixel."
Your selection will be automatically saved.