I know many people who refuse to use vouchers because they feel ashamed/ perceive they will looked upon as 'cheap'.
However, when the voucher doesn't involve a physical copy/showing your phone, they are more than happy to take up the deal.
How do you feel about using vouchers?
Edit: If you're voting Yes, please give reason.
I find that when using a phone when it is often rejected or 'doesn't work'.
Interesting topic.