Business glossary
Invoice number
A unique identifier assigned to an invoice for tracking and reference.
Example
INV-2026-0042 identifies one invoice. The business can use that reference in the customer message, payment record and accounting entry. A revised document should remain traceable to the original transaction.
How it differs from related terms
An invoice number identifies the seller's billing document. A PO number identifies the buyer's purchase order. Keep both when a customer requires a PO reference; one does not replace the other.
Frequently asked questions
What is an example of invoice number?
INV-2026-0042 identifies one invoice. The business can use that reference in the customer message, payment record and accounting entry. A revised document should remain traceable to the original transaction.
How should invoice number be interpreted?
An invoice number identifies the seller's billing document. A PO number identifies the buyer's purchase order. Keep both when a customer requires a PO reference; one does not replace the other.