The recipient might be in your customer directory, but there might be values in the invoice that don’t match your recipient.
Make sure that the customer number you have added to the invoice is the same customer number that’s in your customer directory. If you use matching by address, make sure that the address you’ve added in the invoice address is also listed in your customer directory.
If you use organization number, VAT registration number or EAN on the invoice, make sure that the value also is added in your customer directory.