I don’t think that’s true. An invoice is just a formal request for payment. It doesn’t itself legitimise that request. Otherwise I could send you an invoice f

I don’t think that’s true. An invoice is just a formal request for payment. It doesn’t itself legitimise that request. Otherwise I could send you an invoice for $1m out of the blue and according to that logic you’d have to pay me. There must have been some agreement, most likely in the form of a contract, in advance, for you to have to pay that invoice. And even then, some companies employ large teams of people whose entire job is trying to avoid or delaying paying invoices in order to improve their cash flow.