Introduction
Accounts payable is often described as an invoice-processing problem. In reality, it is a workflow that starts before an invoice reaches the accounting system and continues after the data has been entered.
Invoices arrive through email, shared folders, portals or other channels. Information needs to be extracted, checked against supplier and purchasing data, validated and eventually posted. Each manual handoff creates another opportunity for delay or error.
Step 1: Capture the invoice
The workflow begins by collecting invoices from defined sources. Automation can monitor approved inboxes or folders, download attachments and route documents for processing.
The objective is to establish a controlled entry point rather than relying on someone to remember which invoices need to be processed.
Step 2: Extract the information
OCR and Document AI can extract supplier details, invoice numbers, dates, purchase-order references, line items, tax information and amounts from invoices.
This is especially useful when layouts vary. Instead of relying entirely on fixed templates, Document AI can interpret the structure of the document and produce usable data.
Step 3: Validate
Extraction alone does not make an invoice ready for posting. The extracted information should be checked against business rules and master data.
Examples include vendor-name and tax-identifier matching, duplicate invoice checks, purchase-order existence, tax validation and calculation checks.
Step 4: Match the transaction
Where purchasing controls exist, the invoice can be matched against the relevant purchase order and goods receipt. A workflow can identify matching transactions and route mismatches to the appropriate person.
This is where automation becomes more than OCR: it connects extracted information to the business process around it.
Step 5: Handle exceptions
Not every invoice should pass automatically. A good workflow makes exceptions visible and explains why an invoice was held.
For example, a missing purchase order, unmatched quantity or inconsistent tax value can be routed to a reviewer. The system handles the routine path while people investigate the unusual cases.
Step 6: Post to the ERP
Once the invoice passes the required validations and approvals, the final information can be transferred to the ERP or accounting system. Depending on the environment, this may use APIs, integrations or RPA.
The result is a connected workflow rather than a collection of isolated automation tasks.
Conclusion
Accounts payable automation works best when the entire process is considered: capture, extract, validate, match, review, approve and post.
The goal is not simply to enter invoices faster. It is to create a controlled, traceable workflow in which technology handles repetitive execution and finance professionals remain in control of exceptions and approvals.