1. Go to "WooCommerce" > "orders".
2. Click on the order ID for the detailed info.
3. Scroll down and click the "apply coupon" button.
4. Paste/type in the voucher ID, then click on the "OK" button.
- To add a voucher, please refer to this guideline, https://veecotech.freshdesk.com/support/solutions/folders/22000176206
5. System will show the applied voucher ID and voucher amount here.
6. Under the "order actions" section, choose "resend quote to customer".
7. Click the "update" button and system will auto send an email notification to the customer.
8. Here's the sample of the email notification received by the customer.