How to Fix the “Invalid Reference to QuickBooks Payment Method ‘Unknown’” Error
This article helps Webgility Desktop users resolve the " Invalid reference to QuickBooks Payment Method 'Unknown' " error when posting transactions to QuickBooks Desktop Enterprise. The issue occurs when the payment method used in an order isn't mapped or recognized in QuickBooks, and the article provides steps to fix the mapping.
Issue Summary
When posting transactions from Webgility Desktop to QuickBooks Desktop Enterprise, you may encounter the following error:
"There is an invalid reference to QuickBooks PaymentMethod 'Unknown' in the ReceivePayment."
QuickBooks Message: "Invalid Argument. The Specified Record Doesn't Exist in the List."
This happens when the order contains a payment method that isn’t mapped or recognized in QuickBooks. To resolve it, the payment method needs to be added and properly mapped.
✅ Resolution Steps
Follow these steps in Webgility Desktop to fix the payment method mapping issue:
1. Go to Sync Settings
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Open Webgility Desktop
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Navigate to:
Connections > Accounting POS/ERP > Sync Settings
2. Access Payment Method Mapping
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In Sync Settings, select the Orders tab
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Click on Configure Mappings under Map Payment Method
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Then click Setup
3. Add or Map Payment Method
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In the Setup window:
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Add a new payment method 'Unknown' if it doesn’t exist
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Optionally, set a Default Payment Method for unmatched entries
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4. Map 'Unknown' to a Valid QuickBooks Method
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Use the dropdown to map the sales channel's “Unknown” method
→ to a valid QuickBooks payment method
5. Save and Apply Changes
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Click Save and Close
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Then select Save & Continue in Sync Settings to confirm the update
🔄 Why This Fix Works
Mapping the missing payment method ensures that Webgility can correctly communicate with QuickBooks during the payment posting process—preventing errors and maintaining data consistency.