How do I disable Zoho Campaigns in Zoho Checkout?

If you do not want Zoho Checkout to be integrated with Zoho Campaigns:

Go to Settings in the top-right corner.
Select Integrations from the sidebar.
Click Remove next to Zoho Campaigns.

Delete Zoho Campaigns

Click Yes to confirm.

Confirmation of Zoho Campaigns deletion

The mailing list that was associated with the payment page will be removed, but the data in the list will not be affected. If required, you can reintegrate by using your credentials to associate a payment page with the same mailing list.