Does plug in include serialised invoicing ?

All orders are databased in WordPress on the Sell Media -> Payments page. When a user purchases from your site, both you and the user will receive emails. The email to the user acts as their invoice.

thanks for your reply but I’m not familiar with sell media – wordpress page . Please comfirm if the email contains an invoice including a serialised (changing one by one for each one) reference number

Users can configure all outgoing emails on the Settings->Emails tab in Sell Media. That said, there currently is no tag that represents the payment id (invoice id). I just committed this small addition and it will be available in the next release.

https://github.com/graphpaperpress/sell-media/commit/611a33b6e595bfc7fa433bbdfe8bfab2b9b07b68