What Is Invoice? Definition and B2B Use

An invoice is a document a seller issues to request payment for supplied goods or services.
Editorial illustration explaining Invoice in a B2B transaction

An invoice is a document a seller issues to request payment for supplied goods or services. It normally identifies the parties, invoice number and date, line items, taxes, total amount, currency, payment terms, and payment instructions required to settle the transaction.

What Invoice controls in practice

Invoice belongs in the order, invoice, approval, payment and reconciliation evidence. Give it a named finance operations owner, a source document and a clear handoff. Otherwise finance has to reconstruct the transaction after an exception appears.

The trade-off

More controls add work at the start. That cost is visible. The cost of weak records arrives later as rework, delayed approval, margin leakage, a payment investigation or a delivery dispute. Set the control depth according to the amount, risk and reversibility of the decision.

Operational record for Invoice
CheckpointWhat the record should show
SourceIdentify the order, contract or delivery event behind the amount
ControlCheck the document against the relevant approval and transaction record
ExceptionRecord the difference, owner and resolution
CloseLink the payment or adjustment back to the open balance

Review points before the transaction moves

  • Confirm the party responsible for the transaction record.
  • Keep the source data and approval with the transaction.
  • Record exceptions instead of silently changing the original instruction.
  • Make the downstream owner able to reconstruct what happened without an email search.

Related Quotable resources

Continue with payment acceptance, business document templates and quotation, invoice and purchase order comparison. These pages cover the commercial workflow and the records that connect Invoice to the next transaction step.