Correct way to deal with a credit note in 1.8.7

[gh]

>
> Makes sense, but somehow feels "wrong" as I have 2 physical
> bits of paper, with 2 different supplier ref. numbers -
> therefore vendor report doesn't show the whole picture for
> that particular account.
>
>
> Thanks for the advice,
> Maf.

Have you tried to post a new bill with a negative price?
It is not pretty but it works (GC 1.8.8).

gh