# Vendor invoice

The `VendorInvoice` family — 3 operations.

A supplier invoice captures the bill for one purchase order — merchandise match lines priced per PO line, actual landed-cost components, or both (at least one side). The invoice number is the double-pay guard: one number per billing supplier account. Compose and edit while draft, then capture it: costs post and the three-way match stamps matched or flagged per line. Cancelling a draft is the exit.

## Operations

| Operation | Kind | What it does |
| --- | --- | --- |
| [updateVendorInvoice](/reference/vendor-invoice/updateVendorInvoice/) | mutation | Edit a vendor’s invoice — what a supplier billed you against a purchase — change its details. |
| [vendorInvoice](/reference/vendor-invoice/vendorInvoice/) | query | Look up one record — a vendor’s invoice — what a supplier billed you against a purchase. |
| [vendorInvoices](/reference/vendor-invoice/vendorInvoices/) | query | The vendor invoice list — each entry is a vendor’s invoice — what a supplier billed you against a purchase. |