This is on by default.
To switch off, login to TourCMS > Tours > Choose Tour > Descriptions & Image > Custom Fields
Update "Mobile and Printed Vouchers" field, insert the word false
Once updated, it may take several hours for the cache to clear, once it has, that tour will no longer display "Mobile & printed vouchers accepted" info on that tour page.
Product Page Before:
Product Page After:
Data is not updating? - Clear your Cache
If you do not have the custom field in TourCMS, you can easily create it.
Login to TourCMS
Create a new content field
Name: Mobile and Printed Vouchers
Type: Single text line
Once this has been completed, start from the top of this article