I cannot test this at the moment, but 2 thoughts:
1) perform a receipt for a qty of .01 of the item (a qty of zero is not permitted, and this will not work for serialized items), and voucher against this receipt. Later when you physically receive the parts, perform another receipt for the real quantity less the .01. Eventually the qty ordered, received and invoiced will be equal and the item will fall off the report.
2) received the full quantity in an intransit location, and voucher against the receiver. The item will fall of the report immediately, but your intransit location will tell you what you are "owed" by that that supplier. When the item physically arrives, perform a transfer to the true sock location rather than a PO receipt.
I actually like the 2nd option better now that I think of it, because I am not sure how the received but not vouchered report will look in scenario 1. But test these out and let us know what you find.
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