Check Every Supplier Invoice Before You Pay It
It matches each invoice with its purchase order and goods receipt, checks tax and supplier details, tests for tampering and duplicates, and routes exceptions to your AP approver before payment.
Every Invoice Checked, Not a Sample
More Than 10 Forensic Checks per Document
The AP Invoice Compliance AI Agent is one of KlearStack's Document GRC Agents. It checks each supplier invoice before payment against its purchase order, goods receipt, tax rules and your approval policy, tests the file for tampering, and routes exceptions to a named approver who makes the decision.
AI Checks the File. Your Team Keeps the Decision.
Checks Run on Arrival
Every invoice is checked as soon as it comes in.
Your Approvers Decide
Exceptions and payment sign-off stay with the approvers you name.
Sign-Off in Your Order
Approvals follow the sequence you set; out-of-order sign-off is blocked.
Inside Your Network
The agent can run on-premise, so supplier data stays with you.
Invoices Get Checked in a Hurry. Errors Surface After Payment.
When AP teams match invoices by hand, month-end volume decides how closely each one gets checked.
Matched by Eye
Staff tick invoices against purchase orders and receipts by hand. Small price or quantity gaps pass on busy days.
Duplicates Get Paid
The same invoice arrives twice, once by email and once by courier. Without a check, both can be paid.
Edited Invoices Look Real
An altered amount or bank detail looks genuine on screen. Nobody at the desk can test the file itself.
Seven Checks on Every Supplier Invoice
Each check compares the invoice with a document or rule you already use. Expand one to see how.
Rates, quantities and totals are compared with the purchase order, and any difference beyond your threshold is flagged with both values side by side.
The invoiced quantity is compared with the goods receipt, so you never pay for more than arrived at your dock.
An invoice matching one already received, by supplier, invoice number or amount, is flagged before it can be paid a second time.
The tax billed is checked against its parts, such as SGST plus CGST, and against the rates your rules allow.
Supplier identifiers are checked against your rules, such as a GST number that fails the valid pattern or details that differ from the PO.
The invoice file runs through more than 10 forensic checks, so an altered amount or detail is flagged before anyone approves it.
A rule flags every invoice above the amount you set, so it gets the extra review your policy requires.

Follow One Supplier Invoice From Inbox to Decision
An example invoice from a steel supplier, from arrival to a recorded decision. Your rules will differ.
Arrives
The invoice lands in your AP inbox. The router hands it to this agent, which finds its purchase order and goods receipt by PO number.

A Payment Decision Your Auditor Can Retrace
One trail behind every result
- Every check run on the invoice, with its result
- The rule and threshold behind each result
- Each approver, in the order they signed
- The final decision for the invoice
Evidence where your team needs it
- Exceptions routed to the AP approvers you name
- A bundle report you can export or email
- Checked invoice data to your ERP through Excel, CSV or API
- A pass, fail or not-applicable result per check
Where the Agent Stops
Clear boundaries keep the decision with your people and your policy.
It does not pay invoices or release payments
Your payment run does.
It does not create purchase orders or goods receipts
It checks against the ones you already have.
It does not change your approval rules on its own
Changes go live only after approval.
Invoices In From Your Inbox, Results Out to Your ERP
Intake: Invoices, purchase orders and goods receipts arrive by email, Drive folder, Amazon S3, OneDrive, WhatsApp or secure FTP. The router hands invoices to this agent. Results: Checked data and decisions move to your ERP or accounting system through Excel, CSV or API.
Your business system
Checked data and decisions move through Excel, CSV or API.
Documents Processed
the same engine checks invoices, statements, loan files and trade documents.
Faster Turnaround
invoices move from arrival to an approved decision five times faster.
Lower Checking Costs
savings on data entry and auditing costs once the agent runs the checks.
Forensic Checks per Document
every invoice is tested for tampering before anyone approves it.
Supplier and Payment Data Can Stay Inside Your Network
The AP Invoice Compliance AI Agent runs on-premise as well as in the cloud, with the same checks either way.
Discuss an On-Premise DeploymentQuestions About the AP Invoice Compliance AI Agent
Everything operations, risk and audit teams usually ask before a pilot.
The AP Invoice Compliance AI Agent checks every supplier invoice before payment. It matches the invoice with its purchase order and receipt. It checks tax and supplier details. It tests the file for tampering.
See the Agent Check Your Own Invoices
Send us a batch of invoices with their purchase orders and receipts. We check them in a Free Proof of Concept and show you every flag with its evidence.








