Allow sending a 'copy invoice'
Customers often ask for a copy of an older invoice that's been paid. When either resending or downloading it, Xero creates a new PDF that shows the invoice as paid with a 0.00 balance.
I should be able to send an exact copy of the original that clearly states it is a copy. In fact, HMRC states that a request for another copy of a VAT invoice SHOULD be as per the original and state that it's a duplicate.

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