If it’s an e-voucher then yes, you can update the message at any point even if the customer has already received it. If you want to email the customer directly, all you have to do once you’ve updated the message is download the voucher PDF and email this over to the customer. To resend the voucher automatically, click the 'Resend Voucher to Recipient' button.
If it’s a postal voucher then you have to check the order's status first to see what stage it’s at. When viewing the order in Gifted, the order's status will show at the top (as shown in the screenshot below).
If the customer still wants a postal voucher, you can re-dispatch the postal voucher from your property. If you are not able to do this or would like our fulfilment centre to help, send our support team a message at support@journey.travel and we look into this further for you.