By default, the gift cards that have been created automatically will not have any expiration date.
If you want to change this behavior, go to plugin settings dashboard and set the validity of all gift card in the “Gift card expiration date” entry.
You must set the value by months. For example, if you want all the sold gift cards to expire in twelve months, you must set the value as 12.
The gift card expiration date is included in the email sent to the user.
This setting is not retroactive and will be applied only to the gift cards created after editing the expiration.