(IANA I am not an accountant) but how is it legal? as a customer you want to pay against an invoice, and AFAIK it is required by law in most places.
But in general, this is why proforma invoices exist.
(IANA I am not an accountant) but how is it legal? as a customer you want to pay against an invoice, and AFAIK it is required by law in most places.