What monitoring obligations does Access Point have for e-invoice?

Short answer

The Access Point should be able to track the entire life cycle of the message: receipt of the document from the customer, validation, recipient search, sending, technical acceptance or failure, possible status responses and evidence for audit. It is important for the company that the postman does not only display the "sent" status, but that he can distinguish between validation, participant lookup, transport, delivery, rejection and repetition after an error.