When using the batch email feature of QuickBooks to email forms, such as invoices and customer statements, the same form is emailed to all the customers. The recipients should only be receiving the invoice or statement meant for them.
This issue may be related to Windows user permissions for the system's TEMP folder where the PDF files are stored until they are emailed out. The current Windows user, or user profile, may not have the adequate permissions to edit or rename files located in the system's TEMP folder.
Please check the permissions your Windows user has been given to the TEMP folder to make sure you have full control to that folder. If you're not sure how to do this, please see a IT computer specialist for help.
At Intuit, we strive to provide the highest quality product by assigning resources to address the issues with the biggest customer impact. In some cases such as this one, a fix will not be immediately available but may still be included in a future release.
Any future updates on this issue will be included in this help article.