---
title: "Retrieves a single invoice by its Transaction ID, including line items, issuer/recipient address details, and web links."
method: GET
path: "/api/Invoice/{id}"
tags: ["Invoice"]
---

# Retrieves a single invoice by its Transaction ID, including line items, issuer/recipient address details, and web links.

`GET /api/Invoice/{id}`

## Path parameters

- `id` integer, required

## Response `200`

Returns the invoice details with line items, issuer/recipient, and links.

- Invoice — A customer invoice including line items, status, amounts, issuer/recipient details, and web links.
  - `TransactionID` integer — Unique identifier for the invoice transaction.
  - `AccountIDFK` integer — The Avaza account this invoice belongs to.
  - `TransactionPrefix` string — Prefix used in the invoice number (e.g. 'INV').
  - `InvoiceNumber` string — The full invoice number including prefix.
  - `CompanyIDFK` integer — The customer company ID this invoice is for.
  - `CompanyName` string — Name of the customer company.
  - `ExternalContactUserIDFK` integer — The external contact user ID associated with this invoice.
  - `Subject` string — Subject line for the invoice.
  - `DateIssued` string, date-time — Date the invoice was issued.
  - `DateSent` string, date-time — Date the invoice was sent to the customer.
  - `DueDate` string, date-time — Payment due date.
  - `TransactionStatusCode` string — Current status. Values: Draft, Sent, Late, Paid, Partial, Void.
  - `TaxAmount` number, double — Total tax amount across all line items.
  - `TransactionTaxConfigCode` string — Tax configuration: 'EX' (exclusive) or 'INC' (inclusive).
  - `Balance` number, double — Outstanding balance remaining on the invoice.
  - `CurrencyCode` string — ISO 3-character currency code for the invoice.
  - `TotalAmount` number, double — Total amount of the invoice including tax.
  - `ExchangeRate` number, double — Exchange rate to the account's base currency. 1.0 if same currency.
  - `Notes` string — Additional notes or comments on the invoice.
  - `CustomerPONumber` string — Customer's purchase order number for reference.
  - `DateCreated` string, date-time — Date and time the record was created.
  - `DateUpdated` string, date-time — Date and time the record was last updated.
  - `LineItems` InvoiceLineItem[] — Line items on this invoice.
    - `TransactionLineItemID` integer — Unique identifier for the line item.
    - `InventoryItemIDFK` integer — The inventory/product item ID for this line item.
    - `InventoryItemName` string — Name of the inventory/product item.
    - `InventoryItemSKU` string — Stock Keeping Unit code for the inventory item.
    - `Description` string — Text description for the line item.
    - `Quantity` number, double — Quantity of items on this line.
    - `UnitPrice` number, double — Price per unit for this line item.
    - `TaxAmount` number, double — Calculated tax amount on this line item.
    - `TaxIDFK` integer — The tax rate ID applied to this line item.
    - `TaxCode` string — Short code for the applied tax rate.
    - `TaxName` string — Name of the applied tax rate.
    - `ProjectIDFK` integer — Optional project ID this line item is attributed to for reporting.
    - `ProjectTitle` string — Title of the associated project.
    - `Amount` number, double — Calculated line total (Quantity x UnitPrice less Discount).
    - `Discount` number, double — Discount percentage applied to this line item.
  - `Links` InvoiceLinks — URLs for client-facing view, internal view, and editing an invoice in the Avaza web application.
    - `ClientView` string — URL for the customer to view and pay the invoice online.
    - `View` string — URL for viewing the invoice in the Avaza application.
    - `Edit` string — URL for editing the invoice in the Avaza application.
  - `Issuer` IssuerDetails — Billing address and tax details for the Avaza account (the party issuing an invoice or estimate).
    - `BillingAddress` string — Formatted multi-line billing address.
    - `BillingAddressLine` string — Street address line of the billing address.
    - `BillingAddressCity` string — City/suburb of the billing address.
    - `BillingAddressState` string — State/province of the billing address.
    - `BillingAddressPostCode` string — Postal/ZIP code of the billing address.
    - `BillingCountryCode` string — ISO 3166-1 alpha-2 country code of the billing address.
    - `TaxNumber` string — Tax registration number (e.g. VAT number, ABN, EIN).
  - `Recipient` RecipientDetails — Billing address details for the customer receiving an invoice or estimate.
    - `CompanyIDFK` integer — The customer company ID.
    - `CompanyName` string — Name of the customer company.
    - `RecipientFormattedBillingAddress` string — Pre-formatted multi-line billing address for the recipient.
    - `RecipientBillingAddressLine` string — Street address line for the recipient.
    - `RecipientBillingAddressCity` string — City/suburb for the recipient.
    - `RecipientBillingAddressState` string — State/province for the recipient.
    - `RecipientBillingAddressPostCode` string — Postal/ZIP code for the recipient.
    - `RecipientBillingAddressCountryCode` string — ISO country code for the recipient.

## Other responses

- `401` — Unauthorized
- `404` — Not Found

---

[API](https://skmtc.net/avaza/apis/avaza-api-documentation.md) · [All operations](https://skmtc.net/avaza/apis/avaza-api-documentation/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/avaza/avaza-api-documentation/versions/1eeadf750514/schema)