We email invoices monthly to all workspace owners.  You can also view past invoices and receipts by going to airtable.com/account (from a laptop or desktop) and clicking the workspace on the left side of the page.  The Billing History section will be listed on the right side of the next page:

Under the Billing History section, you will see two documents (an invoice and a receipt) for each monthly transaction: 

Invoice

• The invoice is an itemized invoice detailing your transactions.
• The top half of your invoice displays the prorated charges (and credits) from any billable collaborators added or removed from the upgraded workspace during the past month.
• The bottom half of your invoice takes the current number of billable collaborators on your workspace and charges for their access for the forthcoming month.
• If any of these collaborators leave the workspace (or if their permission levels are changed to read-only) during the next month, a pro-rated credit will appear in the top section of next month's invoice. 

Receipt

• The receipt is your proof of payment and not a replacement for an itemized invoice.
• Your receipt provides the type of credit card used, the last four digits of your credit card, and the amount charged.
• The amount on the receipt will match the balance due on your invoice.

Please note, only the owner of a workspace will be able to view the workspace settings page.  All other collaborators on a workspace will not be able to access your billing information.