The version 3.3.10: [wpgv_giftvoucher]
The update version 4.0.0: [wpgv_giftcard] This page is using above shortcode to display voucher form. This shortcode can add to any page of website.
This Plugin is exactly that what ive looked for ages.
I had some issues regarding Translations and additional Fields but the Tech Support solved those issues within few minutes for me!