Eight transaction errors you should never discover after posting

Every day, thousands of transactions move between suppliers, customers, warehouses, and finance systems. Most go through without a problem. But the ones that don’t can create a surprising amount of work.

A missing field, incorrect quantity, or outdated trading partner requirement might seem minor…until it triggers a rejected invoice, a customer deduction, a delayed payment, or hours of investigation For vendor compliance teams, finding errors is one thing. The challenge is finding them early enough to do something about them.

Here are eight transaction errors you should catch before they become costly downstream problems.

1. Incorrect purchase order numbers

A purchase order (PO) number is more than a reference. It connects orders, shipments, invoices, and payments. When a PO number is missing, incorrect, or doesn’t match the customer’s records, the transaction may be rejected or require manual reconciliation.

Catch it early: Validate PO numbers against the original order before transmitting related documents.

2. Quantity mismatches

The customer orders 500 units. The supplier confirms 500. But the advance shipping notice (ASN) says 450, while the invoice lists 500. Now someone must determine what actually shipped, what arrived, and what should be paid.

Catch it early: Compare ordered, confirmed, shipped, and invoiced quantities. Flag discrepancies before documents move downstream.

3. Incorrect pricing or discounts

Outdated contract prices, missed promotional discounts, and incorrect unit costs can quickly lead to invoice disputes and deductions. These errors are especially troublesome when pricing agreements vary by customer, product, or region.

Catch it early: Validate transaction pricing against current customer agreements and approved pricing data.

4. Missing or inaccurate ASNs

Many large retailers require advance shipping notices with specific information about shipment contents, packaging, and delivery. An ASN that arrives late, contains incorrect data, or doesn’t meet the customer’s requirements can trigger compliance deductions—even when the shipment itself is correct.

Catch it early: Check ASN completeness, accuracy, and customer-specific requirements before transmission.

5. Invalid product identifiers

An incorrect SKU, GTIN, or other product identifier can prevent a trading partner from matching a transaction to the right product. This results in rejected documents, receiving delays, or inventory discrepancies that require manual investigation.

Catch it early: Validate product identifiers against approved product master data and trading partner requirements.

6. Incorrect shipping or delivery information

A wrong delivery location, missing carrier reference, or inaccurate requested delivery date can disrupt receiving operations and create disputes over delivery performance. And when the transaction data doesn’t match what physically happened, resolving the issue becomes much harder.

Catch it early: Verify shipping details against the order, routing instructions, and customer requirements before dispatch.

7. Missing mandatory fields

A transaction can be technically valid and still fail a customer’s compliance requirements. One trading partner may require a specific reference number. Another may demand additional packaging information or particular document fields.

Catch it early: Validate documents against each trading partner’s current business rules, not just standard EDI formats.

8. Duplicate transactions

A duplicate invoice, order, or shipment notice can create confusion across multiple systems. Depending on where the duplicate enters the process, it may cause unnecessary reconciliation, duplicate processing, or payment exceptions.

Catch it early: Identify duplicate document numbers and transaction patterns before processing or posting.

The real problem isn’t the error. It’s how long it takes you to find the error.

Each of these mistakes is manageable when caught early. But once a transaction moves through receiving, invoicing, payment, or reconciliation, the cost of correction can grow. What could have been a simple data correction becomes a dispute involving multiple teams, systems, and trading partners.

That’s why continuous compliance matters. Rather than relying on periodic audits or waiting for customer deductions to reveal problems, organizations can validate transactions against trading partner requirements while they’re still in flight.

With automated validation, exception alerts, and visibility into transaction status, vendor compliance teams can identify issues sooner, prioritize corrections, and prevent avoidable errors from spreading across the supply chain. The goal isn’t simply to process more transactions. It’s to process more transactions correctly the first time.

Catch errors before they become deductions

Discover how OpenText Trading Grid Intelligence helps organizations identify transaction issues, improve trading partner compliance, and reduce costly downstream exceptions.

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