If quickbooks has mistakenly logged a transfer twice how do I remove the duplicate transfer?

Hello accounts-schurpu,

Welcome to Community!  Having duplicate transactions in QuickBooks Online, can have a negative impact on your books.  Removing duplicate entries can be done effortlessly, you your accounts remain balanced.  I would be glad to assist!

Please be advised that removing entries after an account has been reconciled, can affect other areas of your books.  In this situation, it's best to reach out to your accountant for their expertise and best course of action.  If you don't have an accountant, we can help you locate a ProAdvisor in your local area. 

If the reconciliation process has not been performed, here's how to remove the duplicate transaction.

If you have any other questions, feel free to reach back out.  We would be glad to help!