For receiving and sending, use an e-invoicing network such as Peppol. When using Peppol, a few things are really well taken care of. Consider the End User Identification requirements for registering on the network. This means you can always be sure that the sender of the invoice has been verified and that they may send invoices. In addition, only invoices complying with the invoice requirements can be sent over the network. Of course, the invoices must also comply with an invoice standard described and validated on the network. This way, as the recipient of the invoice, you're sure that the sender exists and that you can submit the invoice without errors.
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