Hi.

My usecase is as follows.

We need to get a list of all invoices assigned to us through the API.
Then we will look at all the invoices lines, and verify that the products and prices are correct.
Once this has been done, we will approve the invoice (authorize it) through the API.

If for any reason, there is an issue with the verification, or the invoice can not be approved, we need to be able to add a note to it, and assign it to a human.

So far I have identified ExternalSupplierInvoicesHandling.svc as the place to get the invoices, and AuthorizeDetailsHandling.svc as the place to transfer the invoice to a new person.
But I have not found any call that can add a note to the invoice or authorize it.

This question is mainly about how to add a note to the invoice.
I found a post on here about viewing notes, but you had to use SQL.
Would you have to do this to add a note as well?