For Direct Checkout deals, Groupon collects your shipping details at the time of purchase and passes them to the merchant via a secure route. Your Groupon voucher will be redeemed when your item has been dispatched to you by the merchant.
How should I redeem my voucher?
Groupon will pass your shipping details straight to the merchant by a secure route after you purchase your Groupon voucher. The voucher in your Groupon account is for your records only. You do not need to pass any information to the merchant.