Hello Amazon team and everyone else

I see a new section in my manage order section when a new order comes, it comes with it like "No Invoice Uploaded"

I am an FBM seller and I am not legally required to send invoices, yea sure i can send commercial invoices but is that compulsory or i am only required to send the commercial invoices only when the customers ask for it. ?

that's the main part please amazon reply to that @Adam_Amazon_ @Noor_Amazon_ is it compulsory or im only required to send commercial invoices only when customers ask for it ?

Thank you in advance