Each campaign that has a form (Refer a Friend, Callback Request) as a custom thank you page which can override the Questionnaire's thank you page. To set this page simply check the last panel on the Campaign Content section:
Thank You Page
You can customize and preview your campaign thank you page, similar to the way you can set your Questionnaire Custom Thank you Page.
Thank You Page Display
Whenever a user submits the campaign form, there is a fallback check for all the thank you pages and goes like this:
- Campaign Custom Thank you Page
- Questionnaire Custom Thank you Page
- Default Questionnaire Thank you Page
From 1 to 3, whenever one is empty, go to the next one.