Hi FinanceDMPL,
That "No valid payee number" message can really catch you off guard when you're just trying to get your invoices out the door. No worries! You're definitely not the first to wonder what's going on there.
What's happening is that the invoice form you've selected to print from is an M-Powered one. These templates usually have names that start with "MPS". Even if you're not using M-Powered invoicing, it still expects a valid payee number for those forms, which is why that message keeps popping up.
To stop the message from appearing, just switch to a different invoice form that doesn't start with MPS.
If you've customised your current invoice layout (totally understandable!), you'll need to re-customise a new one based on a non-MPS form. Just start with a standard MYOB template and tweak it to suit your needs, no more pop-ups. Customising invoices has information to help you with this.
Here's a help article that steps you through it: Printing from AccountRight - MYOB AccountRight - MYOB Help Centre.
Regards,
Sai