I have set up recurring invoices, and one of them recently tried to charge the customer 2nd time after 1st unsuccessfull attempt. I do not want this to happen again.

We appreciate you bringing this to our attention, userstorage123reg. To help prevent this from happening, I recommend reviewing your recurring templates and payment collection settings in both QuickBooks Online and GoCardless.
 

Start by reviewing your recurring invoice and payment settings. Go to Recurring Transactions under the Gear icon, open each relevant template, and make sure all settings are correct.
 

Next, check your GoCardless payment settings and direct debit mandates. In your GoCardless settings, see if automatic retries are enabled and disable them if you don’t want failed payments to be retried. 

Also, verify the customer’s mandate status, cancel any pending submissions if necessary, and confirm that your integration and payment setup in the GoCardless app within QuickBooks are properly configured.
 

For further details and frequently asked questions, refer to this helpful article: Getting Started with GoCardless in QuickBooks Online.
 

If the issue persists after these checks, we recommend contacting our QuickBooks Live Support team for a thorough review and personalized guidance, as they have the tools and access needed to assist you further.  Here’s how:
 

1. Navigate to the Help (?) Icon.
2. Proceed to the Search Tab.
3. In the bottom section, click Contact Us.
4. Enter a brief description of your concern and hit Continue.
5. You can choose how you can reach out through Chat or Callback.

You can request a callback from Monday to Friday, 8:00 AM to 6:00 PM GMT, or reach us via chat from Monday to Saturday, 8:00 AM to 10:00 PM GMT.
 

If you have further concerns while completing these steps, our team is ready to assist you.