Receipt collection for Facebook
Cardboard automates the collection of receipts for payments made through Cardboard, so you don't have to collect the receipts yourself.
Receipt collection with email
For card payments, open Ad account settings > Ad account setup in Ads Manager. Under Ad account contact, click Edit email, enter the address, and click Save changes. Then confirm the email that Facebook sends. For monthly invoices, open Billing & payments > Accounts, select the ad account, add the address under Additional invoicing emails, and click Save changes.
Receipt fetching with browser extension
The Cardboard browser extension can upload the receipts for this service.
All you need to do is go to the page where you can download or view the receipts. The extension will let you know which of the receipts are missing from Cardboard and you can upload them in one click.
Since Facebook has different billing URLs for different accounts Cardboard stores the urls on your subscription. This enables the extension to take you directly to the right page after you have done the first upload.