1. At the top menu, click Customers, and select Customer Center.
  2. Highlight a customer, and go to the Sent Email tab.

However, we don’t have an option to verify if the invoices have already been viewed or not by the customers. I suggest you send feedback straight to our engineers to let […]

Resolution for 'been opened issue: 'Can I track which invoices have been emailed and when and if they have been opened by the client? I used to be able to do this.' available: Yes.

The been opened issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the been opened issue yourself by looking for a resolution described in the article. If it is a complex been opened issue or you are unable to solve the issue, you may contact us by clicking here or by using other been opened support options.

For more information about resolving issues related to been opened in Quickbooks/QBO or to get support for the issue 'Can I track which invoices have been emailed and when and if they have been opened by the client? I used to be able to do this.', click the link below: