Please ensure that each digital voucher product is marked as both “virtual” and “downloadable” on the product page. This adjustment is crucial for WooCommerce to recognize the product as one that does not require shipping and can be delivered electronically, which in turn should help in automatically completing the order upon successful payment.
For more detailed guidance on managing orders and setting up your products correctly, we encourage you to review the documentation provided here: Managing Orders.
Should you have any further questions or require additional assistance, please do not hesitate to contact us.
