Only targets User Upgrades which are marked as 'recurring'.
Fully phrased, and dumps the content of the transaction details to the phrase printed for each active user upgrade.
Be aware that the notification message can potentially expose private PayPal details that you do not want all staff to see.
I recommend using Add-on install & upgrade or Install and Upgrade by waindigo to install this addon.
Contributing features or bug fixes
Please create a Github Pull request via the "Find more info at github.com..." link.
If you appreciate this addon, please consider a contribution via PayPal. Details will be provide via private conversation.
Please contact me if you wish for different licencing arrangements.