Blacklisting referral URLs
AffiliateWP provides a blacklist setting that allows you to block specific sites or pages from generating referrals.
If you wish to block specific affiliates’ websites from generating referrals for any reason, you can do so by going to Affiliates → Settings → Misc, and scrolling down to the Referral URL Blacklist setting.
Enter the URL(s) of the website(s) you wish to block in the input field, and click the Save Changes button. Enter one URL per line if entering multiple URLs. You may enter a domain name to block all referrals from that site, or specific pages to only block specific pages.
Note: This will only apply to new visits from a website after the URL has been saved in the Referral URL Blacklist input field.