Objective:

• Duplicate Payments in Quickbooks Online
• Multiple Payments in Quickbooks 

Environment:

• Clio Manage

Additional Information:

• For more information on error code 6540 click here
• For more information checking Quickbooks sync errors in Clio click here

Answer :

The Payment was deleted and reapplied in Clio which caused duplicate Payments in Quickbooks. The original payment may not have been deleted from the bill in Quickbooks Online due to an error.

Check the Quickbooks Online sync errors in Clio and look for errors with Code 6540.