Official bills or documents that list what was sold or services provided and how much money someone needs to pay.
From Old French 'envois' (goods sent), plural of 'envoi.' The word traveled through trade languages and became the standard term for commercial billing documents by the 1500s.
The word 'invoice' comes from the same root as 'envoy'—both deal with sending something—because invoices literally accompanied goods being sent to track what was shipped and what was owed.
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