Yes, we will send a callback to your callback URL so that you will be notified every time there is an Invoice Created, Paid or Expired.

For Expired Invoice, you need to check this step first:
Dashboard > Settings > Developers > Callback > Invoices > checklist the option for "Also notify my application when an invoice has expired"

Thus, you can follow the next step for Created, Paid and Expired Invoice for your Customer and your own view:
Dashboard > Accept Payments > Invoices > Customized > Invoice Settings > checklist the following options:

a. Customer Notifications:
- Send paid invoice notification
- Send expired invoice notification

b. Merchant Notifications:
- Send email when invoice is paid
- Send email when invoice is expired