I appreciate the fact you responded.  But this response does not seem to recognize the content of my last response.

It appears that when I create and invoice and send it, the customer receives the invoice and I receive a copy. This is as it should be.

The problem is now in the Chrome browser QBO provides a notification that the invoice did not send.

I use the mobile app on my iPhone in the field to create and send invoices. Sometimes I take payment via check, cash or credit cards sending paid invoices real time on site at my customers homes. Then I get home and I check my email to make sure I and/or QBO successfully sent the appropriate correspondence. At home I use Chrome Browser to access QBO.

If QBO continues to act badly I'll call customer service tomorrow. That is if I are willing to take a risk I'll reach a representative that will not listen and or pay attention.  That happens more than half the time.