Are vouchers course specific? Lacey Pope September 21, 2021 16:53 Updated Follow No, vouchers can now be used on any ONS product. Related articles What is the bulk discount structure for vouchers? How do I purchase vouchers? How do I redeem a voucher? I am using an ONS voucher to purchase a course that has had a price change. Why does my voucher not cover the full cost of the course? Comments 0 comments Article is closed for comments.