ered-jaeger answered: you can create the invoice at paypal directly - it’s under the request money tab!

yinza said: The PP site specifically says if you don’t have a tracking number to mark the invoice as “Order Processed/Service Rendered” (though this is still under “Add Tracking Info” which is a little confusing). It’s the same option as for digital delivery.

proteesiukkonen answered: With PayPal, it’s never a good idea to pretend anything beccause it makes it look like you might be scamming people or PayPal, and that’s when they start giving you trouble.

Okay this stuff’s starting to make more sense, I think I know what I’m doing now. Fingers crossed that things will go smoothly. Thanks for all your help people!