Hubdoc - Publish receipt to existing Xero bill
Allow Hubdoc to publish a receipt to an existing 'BILL' in Xero without creating and new transaction and duplicating the amount. Failure to do this forces the user to upload the receipt directly into Xero files instead or opt not to use the BILL feature in Xero and publish transitions in real time from Hubdoc instead. For those wishing to have all their receipts in a magical shoe box in the cloud (Hubdoc) it appears that this would be a way forward.

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Sarah McPhee commented
Quickbooks has this facility and it is really useful. It means when suppliers send in their expense claims, I can forward the invoice and receipts all in one go from one email and then attach each receipt to the one expenses entry.