Electronic invoicing using CMK to deliver Italian compliant xml invoices

Summary:

Is anyone using Collaboration Messaging Framework CMK to deliver XML invoices for Italian Business Units using a Service Provider that delivers the e-invoice to the SDI tax authority?

Content (required):

I am wondering what other users do with Italy specific requirements when invoicing to Public Administration companies where there are for example multiple CUP codes. What fields are you using on the Oracle Invoice Transaction when there are multiple CUP codes? My understanding is these are associated to a specific value/budget that the customer provides.

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