Article from
E-Invoices: Send Attachments.
All attachments you previously sent with PDF invoices in MOCO are now integrated into the XRechnung format and soon into ZUGFeRD as well.
As usual, when creating an invoice, you select the timesheet and receipts – or upload another attachment below the invoice after saving. MOCO embeds these invoice attachments directly into the XML.
For your traceability, the attachments are listed below the invoice in MOCO and can be accessed with a click. The invoice recipient can read and view the attachments using their software/visualization tool, such as the E-Invoice Viewer Quba (Open Source).

Example view from the Open-source E-Invoice Viewer Quba
