Hello @tsfizzy
You can set the Automatically generate coupons option in the settings of our PDF Coupons > Settings plugin.
Set in this option the order status at which the coupon should be automatically generated.
If you have already set this option, check if the order has reached the status at which the coupon and the code should be generated.
If everything is correct and the coupon or code is missing, check if you are using the latest version of the plugin 1.5.0.
Please enable debug log in WP Desk Settings. Then make a test reproducing this issue, and send a link with the error log to us.
If everything is correct also the plugin version, please enable debug log in WP Desk Settings. Then make a test reproducing this issue, and send a link with the error log to us.
Best regards