I learned today that there is a feature in QBO that if you create an invoice but don't send it, the customer can click on the pay invoice link to another one of their invoices and view it. This resulted in wasted time on my part with support, my client was contacted by his customer wondering why there is an invoice he wasn't expecting, and just overall confusion. This could be an option to turn on if you want to allow it but it SHOULD NOT be a default. Support has to turn it off on the backend. It's not even something that can be turned off as a user. PLEASE change this. We create invoices and work on them sometimes for weeks before we want to send them. We don't want customers seeing invoices that are not correct. Or they could be way under priced and they pay it. Not a good feature here....