---
title: Using Accounts Payable Invoice Processing
description: Accounts Payable Invoice Processing enables specialists to manage invoice processing cases and perform end-to-end invoice processing.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/australia/source-to-pay-operations/accounts-payable-operations/use-ap-invoice-processing.html
release: australia
product: Accounts Payable Operations
classification: accounts-payable-operations
topic_type: concept
last_updated: "2026-03-12"
reading_time_minutes: 2
keywords: [APO, Accounts Payable Operations, end-to end invoice processing, invoice ingestion, invoice processing case, Accounts Payable Specialist]
breadcrumb: [Use, Accounts Payable Operations, Finance and Supply Chain]
---

# Using Accounts Payable Invoice Processing

Accounts Payable Invoice Processing enables specialists to manage invoice processing cases and perform end-to-end invoice processing.

-   **[Invoice ingestion using the AP Invoice API](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/source-to-pay-operations/accounts-payable-operations/invoice-ingestion-using-api.md)**  
The AP Invoice API enables bulk import of AP invoices from external systems to Accounts Payable Operations using cXML, JSON, or XML.
-   **[Rules based engine](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/source-to-pay-operations/accounts-payable-operations/rules-based-engine.md)**  
The rule-based engine maps invoice lines to purchase order lines using unit price, delivered unit price, exact description, exact amount, and amount round off.
-   **[Invoice processing](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/source-to-pay-operations/accounts-payable-operations/work-with-invoices.md)**  
Invoices generated for purchase orders are processed through automated and manual workflows, managed by Accounts Payable specialists from creation to approval.
-   **[Invoice processing cases](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/source-to-pay-operations/accounts-payable-operations/working-with-ingestion-cases.md)**  
Integrate Accounts Payable Operations integration with Document Intelligence to auto-create invoice cases and verify data accuracy.
-   **[Invoice exceptions](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/source-to-pay-operations/accounts-payable-operations/work-with-invoice-exceptions.md)**  
Invoice exceptions are discrepancies during invoice processing that must be resolved before payment, such as missing data, tax variances, or supplier issues.
-   **[Tolerance rules and variances for invoices](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/source-to-pay-operations/accounts-payable-operations/tolerance-rules-and-variance.md)**  
Tolerance rules define the permissible variance amount on an invoice to determine if the total exceeds tolerance limits and requires exception handling.
-   **[Invoice approvals](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/source-to-pay-operations/accounts-payable-operations/invoice-approvals.md)**  
Invoice approvals in Accounts Payable Operations route exception-free invoices to approvers using configured rules and track states.
-   **[View invoice documents in the Source-to-Pay Workspace](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/source-to-pay-operations/accounts-payable-operations/view-invoice-attachment.md)**  
View invoice documents directly in the Source-to-Pay Workspace using Document Viewer without downloading them.

**Parent Topic:**[Accounts Payable Operations overview](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/source-to-pay-operations/accounts-payable-operations/use-acc-pay-mgmt.md)

**Related topics**  


[Create a knowledge base article for invoices]()

[Invoice case categories and subcategories]()

[Using Invoice Case Management]()

[Advanced Work Assignment in Accounts Payable Operations]()

[Configure Advanced Work Assignment for Accounts Payable Operations]()

[Using Advanced Work Assignment for Accounts Payable Operations]()

[Working with Advanced Work Assignment]()

[Interaction management in Accounts Payable Operations]()

[Composing emails with predefined content]()

[Universal Request in Accounts Payable Operations]()

[Playbook for updating the invoice primary data]()

[Using Supplier Collaboration Portal in APO]()

[AI worker case resolution confirmation]()