That's because invoices and receipts are different things (at least in the US). You typically get a receipt for a monthly credit card payment. An invoice may be

That's because invoices and receipts are different things (at least in the US). You typically get a receipt for a monthly credit card payment. An invoice may be an extra that is only offered for example with an annual contract, and may even have to be manually generated, and typically implies payment made separately (NET-30 etc.).