Discerning a reversed purchase receipt

When I undo a line of a purchase receipt, a new line with a minus sign is added. The user can instantly discern that this receipt has been undone.

However, when I cancel or correct a posted purchase invoice, the receipt is nulled by the negative item ledger entries posted by the resulting posted purchase credit memo and there is no way of saying that the receipt has been undone.

We suggest that the cancel or correct a posted purchase invoice action, add the negative line to the corresponding receipt, similar to the one that the 'undo receipt' function does. If this is not feasible, we suggest adding a field like 'reversed' either on the receipt header or lines.

Also, please consider the additional improvement

Disconnect the action of cancelling a posted purchase invoice from the action of undoing a purchase receipt

There is a need to change the price of an item on a purchase invoice that is connected to receipt lines. Cancelling or correcting that posted purchase invoice refers to having added by mistake the wrong amount and not to an error in the receipt. In this case we only want to reverse the posted purchase invoice entries and leave the posted purchase receipt intact but un-invoiced and be able to add it to a correct purchase invoice. In this case the generated posted credit memo should create an item ledger entry that will have a minus quantity in the invoiced quantity and zero in the quantity field. Our customers create purchase orders with hundreds of items, and the received quantity varies from the quantity ordered, and more than one receipt is linked to the same invoice. So having to recreate all the receipts connected to a cancelled invoice is not a simple task. A global setup that will allow us to enable/disable the 'undo receipt' upon canceling of a posted purchase invoice will suffice.

Ideally, we would like to have both implemented.