Thanks very much for getting back to me so promptly.

Please note, it is not when creating a new invoice or on recurring invoices. Basically, once I have allocated my payment, I go to the invoice and I hit the SEND button (refer to the screenshot), which sends to the client showing them that their invoice is now on a zero. The last two invoices that I sent in this way, both were sent twice. I have just tried again, for the third time (I can only send one screenshot - so I was unable to attach it) and again, it has come through twice...

I don't really have time to sit and create duplicate invoices and test, something perhaps has changed, as this has never happened in the past - and I no longer have access to support either, which is rather frustrating, after all of these years. I don't have a dedicated accounts department to assist me with these issues, hence the reason for QuickBooks.

Is there any other way to go about fixing this, as it doesn't look very good on my 'accounts' side that these emails are being sent twice.