I have never seen them say that a second printout is required, nor that a second thumbprint is required.
What is required is marking the DROS with the date/time of delivery, which a second printout really does not accomplish just because it has the delivery date and time on it.
What is required is marking the DROS with the date/time of delivery, which a second printout really does not accomplish just because it has the delivery date and time on it.

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