The Back in Stock Notifications addon allows both registered and unregistered customers to subscribe to back-in-stock and price drop notifications. The process is quite the same the only difference being that the unregistered customers have to specify their email, while the registered customers have this field predefined based on the customer account data.

While the back-in-stock subscriptions are available for the out-of-stock products only, the price drop subscriptions work for both in-stock and out-of-stock products.

Customers can subscribe to notitications both on the product details page and on the product quick view page as shown on the screens below:

Product details pagecus-notify-1.png
Product quick view pagecus-popup-notify.png

When they hit the Notify me button a subscription pop-up appears where a customer can either confirm the subscription or enter the email (for unregistered customers) and confirm. If the Allow customer to specify the product quantity they want to buy option is enabled it will also be possible to specify the number of items they need.

Confirmation pop-upcus-notify-2.png
Subscription confirmation on the product details pagecus-notify-3.png
Subscription confirmation on the product quick view pagecus-popup-notify-1.png

For the price drop notifications customers will also be able to specify the price they want to pay if the Allow customer to specify the price they want to pay option is enabled:

Product details pagecus-pdd-notify.png
Confirmation pop-upcus-pdd-notify-1.png
Subscription confirmation on the product details pagecus-pdd-notify-2.png

When the requested product is back in stock, or the price of the requested product drops, the customer will receive the respective type of email notification and will be able to go to the store and purchase the product using a link contained in the message:

Back-in-stock notificationcus-bins-notification.png
Price drop notificationcus-pdd-notification.png

The above notifications use the default text. You can edit the notification text in the Store setup -> Email notifications section of the Admin area as described in Email notifications: Setup and Maintenance.