Warning Duplicate Supplier Invoice

Hello

I am posting here as well to see if anyone else has an issue with the MYOB Online Business files not having the capacity to warn if a duplicate supplier invoice is entered.  I find it very annoying to have to input supplier invoices in the desktop version and not to be able to utilise the online features because the online version allows duplicated invoices to go through.  When I am busy, I like to have the reassurance that MYOB is warning me if the invoice has been sent through for processing twice.  Surely the developers could work out a way to carry this feature over the the online version, especially as they seem to be promoting the online version as the future way to go??

 

Anyone else annoyed that this feature is not available online?  If I am misinformed and it is available, please tell me how to make sure it is switched on.

 

Thanks