1. Go to "Vouchers" (in Management). A voucher that has been redeemed will have a little green check mark right next to it. 
  2. Click on the Order ID number beside the voucher code, to see the details of voucher purchase.
  3. To view the order regarding the booking, where the voucher was used, click on the Order ID number or the paper icon at the far right side of the row.

Related Articles:

How do I resend the payment confirmation email and the gift voucher to an attendee?
How to expire a Gift Voucher?

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