When i send invoice it is showing undelivered sometimes instead of open sent

Thanks for dropping by here in the Community today, @lynneagnew. I'll help you manage your invoices to ensure they're sent to their respective recipients.

If you notice that an invoice has not been dispatched, I recommend you double-check to ensure that the email address you have for the customer or recipient is correct. Make any necessary changes, and try again. Email addresses play an important role in sending invoices. We need to ensure that it's correct to avoid any issues. Otherwise, it can result in invoices being undeliverable.

If the issue persists, I suggest contacting our support team. This way, a representative can check and investigate to find out the root cause of this issue.

Additionally, I'll be leaving these articles to help you in the future:

• Customise invoices, estimates, and sales receipts in QuickBooks Online
• Set up and send progress invoices in QuickBooks Online

Feel free to reach out to me again with any concerns you may have. I'll always have you back. Keep safe enjoy the rest of the week!