Invoice automation has a simple goal: move a supplier invoice from your inbox to a posted, matched voucher in your ERP without anyone re-typing it. The technology to do this well has changed dramatically — AI vision now reads any invoice layout the way a person does, instead of relying on brittle per-vendor templates. Here is the end-to-end process, step by step.
The 5 Steps of Automated Invoice Processing
01Capture
Pull invoices automatically from email, EDI, scans and portals — PDF, image or paper. No manual sorting or filing.
02Extract with AI (not templates)
AI vision reads header and line-level data — vendor, PO number, amounts, tax, line items — on any layout, including new vendors it has never seen. This is the step where template-based OCR fails and digitization stalls.
03Validate against the ERP
Match the vendor, items, ship-tos and amounts against live ERP data so errors are caught before posting, not after.
04Two- and three-way matching
Automatically compare the invoice to the purchase order and goods receipt, flagging only true exceptions for a human to review.
05Post to the ERP — touchless
Write the voucher directly into Epicor P21 or IFS through the ERP's API, so clean invoices post with no human touch at all.
What Separates Real Automation From a Scanner
Many “invoice automation” tools stop at extraction and hand you a spreadsheet to import — which just moves the manual work downstream. When you compare AP automation software, look for tools that close the loop into the ERP:
- No templates: AI vision handles any vendor and any layout, including first-time invoices.
- ERP validation: data is checked against your real customers, vendors and items.
- Direct posting: the voucher is created in the ERP, not exported for someone to key in.
- Exception-only review: clean invoices are touchless; people only see the ones that genuinely need a decision.
Frequently Asked Questions
You automate invoice processing by replacing manual data entry with an end-to-end AI pipeline: capture invoices from any source, use AI vision to extract header and line data without per-vendor templates, validate the results against your live ERP, run two- or three-way matching against POs and receipts, and post the voucher directly into the ERP — with people only reviewing exceptions. The critical question is where the automation ends. Automated invoice processing software that stops at document data extraction just moves the re-keying downstream; true touchless AP automation writes the matched voucher straight into a system like Epicor P21 or IFS, so clean invoices post with no human touch at all.
Invoice automation is the use of software to receive, read, validate and post supplier invoices with little or no manual keying. Modern invoice AI uses vision models — a genuine OCR alternative — to read any invoice layout the way a person does, including first-time vendors, then writes the result straight into the ERP. Older invoice processing automation relied on zonal OCR templates that had to be built and maintained for every vendor; intelligent document processing (IDP) removes that setup entirely, because the AI reads by meaning rather than by field position. The measure of a mature system is its straight-through rate: the share of invoices that go from inbox to posted voucher with no human touch.
Invoice automation works best when it validates and posts directly into your specific ERP rather than exporting a generic file. Generic tools stop at extraction and hand back a spreadsheet for someone to import — which is re-keying with extra steps. ESS provides AI invoice automation purpose-built for Epicor Prophet 21 and IFS: vendors, items and GL accounts are validated against live ERP data before anything posts, and the voucher is written through a dedicated ERP API — with no Epicor API module required for P21. That ERP document automation layer is what turns document data extraction into a completed, posted transaction instead of another import task on someone's list.
Three-way matching compares the supplier invoice against the purchase order and the goods receipt before approving payment, so you only pay for what was actually ordered and received. Done by hand, it means checking every invoice line's quantity and price against two other documents — slow, tedious and easy to get wrong. AP automation performs the match automatically inside the ERP: lines within tolerance post touchless, while price or quantity discrepancies and missing receipts are flagged as exceptions with the source documents attached for a quick human decision. It is the control step that makes touchless AP automation safe as well as fast — automated invoice processing without matching is just faster mistakes.
Automate AP in Your ERP
ESS provides touchless AP automation software for Epicor P21 and IFS, and AI vision document processing that validates against your live ERP and posts directly — no templates, no re-keying.
