The receipts (invoices) can be accessed within your Planbox account. Here are the steps you need to follow to access them:

- Go to Organization Settings (click on the "gear" icon next to an organization name) 

- Click on "Receipts" (left navigation)

From there, you will have access to all receipts (invoices) for any amount paid. Additionally, you can click on the "Send by email" button (top right) to have Planbox email you receipts automatically.