Hi there, @stephen-bates-de.
I'll share some information about an invoice that is automatically sent by system administration in QuickBooks Online.
There's a possibility that the invoice you've previously created has a recurring transaction saved in QBO. Once there are, QuickBooks will automatically send them to your customers. Also, those transactions may have been set up to Automatically send emails, send later, send a reminder, and 1-day interval.
You'll want to go to the Recurring Transactions page to check the recurring template you've set up. I'm glad to walk you through the steps:
- Go to the Settings ⚙️ icon, then select Recurring Transactions.
- From the Action column of the transaction, select Edit.
- Review the customer's name and details of the template.
- Edit it when necessary.
- Click Save template to close the page.
You may refer to this article: Review your recurring transactions.
If there's no the same information or recurring data, I'd suggest checking the Audit log. From there, you'll see the list of the company's activities, the changes made, and who made them.
Here's how:
- Go to Settings ⚙, then choose Audit Log.
- Select Filter.
- Use the fields on the Filter panel to choose the appropriate User, Date, or Events filter to narrow the results.
- Hit Apply.
For more details, visit this article: Use the audit log in QuickBooks Online.
I've also added an article about how to personalize sales forms and managing customer's transactions.
Let me know if you have other queries. I'm glad to help. Keep safe!