Whenever you are charged for newsletters, add extras, or add mailing addresses to a currently in production newsletter issue and are charged for them, the payment system sends a receipt for the charge.
If you lose or delete your receipt from your email you can always go to your dashboard and at the bottom of the dashboard tab, you'll find a list of receipts that go back 24 months for your convenience. They can be viewed or downloaded as PDF's at your convenience.
Once you are logged in you'll be at the Dashboard
Scroll down to the bottom of the page and you'll see the last 24 months of transaction history.
Each Transaction ID is a link to view that transaction and you'll be able to produce and download a PDF from that screen.
