The amounts shown on invoices etc do not necessarily reflect the actual amount billed to one's credit card. You should provide a transaction receipt each time a card is billed.
We also need this for our billing department at a major university.
I will further add that the invoice for the actual credit card transaction _must_ have the last 4 digits of the credit card shown _on the invoice_. Without an actual invoice with this information, the accounting department will reject the invoice as invalid. This completely prevents us from using DigitalOcean.
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