Invoice Automation Across EDI, PDF and ERP Workflows

What is invoice automation?

Invoice automation is the processing of invoice data. An invoice arrives in whatever form the supplier sends it, its fields are read, those fields are mapped to one internal structure, checked, and then handed to the finance system that needs them.

The distinction matters when scoping a project. Invoice automation is primarily about processing invoice data and documents. AP automation is the broader accounts-payable process that consumes that data — matching, approval, posting policy and payment preparation.

Invoice capture

Capture is the point at which an invoice enters a controlled process. Until then it is an email attachment or a message in a queue; after it, it is a tracked record.

• ·Email attachments sent to a shared AP mailbox
• ·Scanned paper invoices
• ·Supplier portal or upload submissions
• ·EDI messages arriving over an established channel

Each captured invoice keeps its original document or message alongside the extracted data, so the source is always available for review and audit.

PDF and document invoices

Document invoices carry their data in a visual layout. Two suppliers can describe the same commercial transaction with completely different positioning, wording and table structure, and both are valid invoices.

What is read from the document

• ·Invoice number, invoice date and due date
• ·Supplier identity and tax registration details
• ·Buyer entity, PO reference and delivery references
• ·Currency, net amounts, tax amounts and totals
• ·Line items: description, quantity, unit, unit price, tax and line total

Drelo.ai is designed to read these without maintaining a per-vendor template, because template maintenance is what makes the long tail of suppliers uneconomic to automate.

Structured EDI invoices

Structured invoices arrive as defined messages — EDIFACT INVOIC, ANSI X12 810 and related formats — where the standard already defines the fields. Nothing has to be read from a layout, but the message still has to be interpreted correctly.

• ·Segment and element interpretation for the message version in use
• ·Partner-specific conventions inside the standard
• ·Identifier translation between partner codes and your master data
• ·Consistent handling of tax, allowances and charges

The point of handling EDI and documents in one platform is that the validation rules and ERP mapping behind them are defined once instead of twice.

Data extraction

Extraction produces field values, and each value carries a confidence signal. A confident extraction continues through the process; a weak or missing one is surfaced for confirmation rather than silently accepted.

Line-item extraction is the part that determines what is possible later. Header totals are enough to register a document, but matching, GL coding and spend analysis all need line-level data.

Invoice normalisation

Normalisation is the step that makes invoices from different channels comparable. The same commercial fact — a quantity, a tax rate, a currency, a supplier — has to end up in the same field, in the same format, regardless of how it arrived.

• ·One invoice record shape for every channel
• ·Unit of measure alignment across suppliers
• ·Currency and decimal handling
• ·Tax code mapping to your own tax logic
• ·Supplier identifier resolution against the vendor master

Validation

Validation decides whether an invoice record can be trusted. Checks run against the record itself and against your reference data.

• ·Arithmetic: line items, tax and totals reconcile
• ·Duplicate detection against invoices already received from that supplier
• ·Required fields present for the target ERP
• ·Valid tax codes, currencies and entity references
• ·Referenced PO, cost centre or GL account exists

Invoice routing

Routing sends each invoice where it can actually progress. Clean invoices continue toward posting. Anything that failed a check goes to the person or team who can resolve that specific failure, with the reason attached.

Routing rules are usually a mix of entity, supplier, amount and failure type — and they are worth revisiting after the first weeks of live data, when the real exception mix becomes visible.

Invoice status and visibility

Every invoice has a state: captured, extracted, validated, in exception, approved or posted. Having that state in one place answers the questions AP teams are asked daily — where is this invoice, why has it not been posted, and what is it waiting on.

Invoice processing flow

The steps below describe how one invoice moves through processing. How many invoices clear without a person depends on your data quality and how strict your validation rules are.

Exceptions

An exception is an invoice that cannot safely continue. It is a normal part of the process, not a failure of it — the goal is for exceptions to be few, explained and quickly resolvable.

• ·Unreadable or missing fields on a document invoice
• ·Totals that do not reconcile with line items
• ·Duplicate invoice number for the same supplier
• ·Unknown supplier or missing PO reference
• ·Tax or currency values not valid for the entity

ERP posting and integration

The end state of invoice automation is a validated record delivered to the ERP in the shape it expects, with the original document linked to it. Field mapping, entity and currency handling, and tax and GL determination are all part of that delivery.

Where the invoice sits inside the wider payables process — matching against purchase orders and receipts, approval routing, audit trail and SAP-specific considerations — is covered on the AP automation page.

Frequently asked questions

Related pages

Walk through your invoice mix

Send us the formats and channels you receive today, and we will show how they are captured, validated and posted.