I need an invoice / receipt from an order I placed here.

Click near the top of the site where it says [My orders]. Input the email address you used when you placed your order(s). Now, an email is automatically sent to that address, and that email has a link to a special page on our site where you can see a list of all your orders placed on our site under that email address. Click on the order number, and you get taken to the "pickup page" (download page) for that order. From there, you can download the music itself, as well as the license / receipt / invoice as a printable PDF document.