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Invoice Extraction and Two-Way Matching with LLMs
Using LLMs to extract data from invoices and match them with purchase orders
By Abizer Jafferjee
March 17th, 2025

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Introduction

  • Keeping finances in check is more important than ever for businesses.
  • Traditional invoice processing is slow, frustrating, and full of errors.
  • LLMs (Large Language Models) are changing the game, making it easier to pull data from different invoice formats, extract key details, and handle large volumes effortlessly.
  • Two-way matching with purchase orders (POs) ensures payments are accurate and prevents costly mistakes.
  • DocumentPro simplifies this entire process—no more manual work, no rigid rules, just smart automation that gets it right.

Why LLMs Are a Game-Changer for Invoice Processing

Invoices come in all shapes and sizes, making manual data extraction a hassle. LLMs are designed to cut through the complexity, understanding different formats and pulling out key details like invoice numbers, vendor names, dates, and amounts—no matter how they’re structured. They can even extract multiple line items at once, making large invoices just as easy to process as small ones.

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Why Two-Way Matching Matters

Two-way matching is critical to making sure payments are accurate. It helps:

  • Catch errors before they become costly mistakes.
  • Ensure invoices match POs, so you only pay for what was actually ordered.
  • Reduce manual workload and improve compliance.
  • Stop duplicate or fraudulent invoices from slipping through.

How Invoice Matching Has Been Done—And Where It Falls Short

For years, businesses have relied on outdated methods to match invoices with POs. Here’s how it’s traditionally done:

  • Manual Review: People check invoices and POs by hand, using judgment to allow minor differences (e.g., rounding errors, small price changes). It works—but it’s slow and prone to human error.
  • Rule-Based Matching: Software compares invoices and POs using rigid rules. If the numbers don’t match exactly, the system flags it, even when the difference is acceptable.
  • Threshold-Based Matching: Some systems allow small discrepancies within a set limit (e.g., a 5% price difference). But these thresholds aren’t always flexible enough for real-world situations.
  • Fuzzy Matching with AI: This is where things get smarter. AI-powered systems like DocumentPro can analyze and compare invoices and POs the way a human would—recognizing near matches and applying business logic instead of rigid rules.

Traditional software fails because it doesn’t think the way humans do. A person might recognize that a supplier changed their name slightly or that a small price fluctuation is reasonable, but standard systems reject anything that’s not an exact match. AI solves this by using contextual understanding and intelligent comparison.

How DocumentPro Takes Matching to the Next Level

DocumentPro is built to work the way businesses actually do, offering:

  • Plain Language Business Rules: No technical skills needed—just define matching rules in simple language.
  • Seamless Database Connectivity: Connects to QuickBooks and other databases for real-time PO matching.
  • No-Code Customization: Set up different matching scenarios without writing a single line of code.
  • AI-Powered Decision Making: Uses intelligent matching to identify the best PO match, even when details aren’t identical.

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Why Now Is the Time to Automate

Automation isn’t just for big companies anymore—it’s more accessible, affordable, and effective than ever. Businesses that make the switch gain:

  • Faster, More Accurate Processing: No more waiting days to verify invoices—AI does it instantly.
  • Flexibility Without Complexity: Business teams can manage automation without IT support.
  • Effortless Scaling: Handle growing invoice volumes without hiring more staff.
  • A Competitive Edge: Automating invoice processing frees up time for strategic decision-making instead of paperwork.

AI-driven automation isn’t just a luxury—it’s becoming a necessity to stay competitive.

Getting Started with DocumentPro

Making the switch is easy:

  1. Integrate with your existing systems.
  2. Customize matching rules—no coding required.
  3. Automate invoice processing and free up valuable time.

Modernize your accounts payable with DocumentPro and move beyond data extraction to intelligent, real-time automation that works just like you would—but faster.