[GNC] One accounting entry, two invoices

[Jim DeLaHunt]

Christian:

On 2025-10-02 10:28, Christian H. Kuhn via gnucash-user wrote:
> Hi all,
>
> in gnucash-de, noone knew the answer, so i ask here. I use the german 
> version of gnucash, so please excuse if a have the menus wrongly 
> translated.
>
> Chess club, non-profit. Account numbers from SKR49 which has been 
> standard for non-profit clubs until end of 2024.
>
> A club member pays his membership fees for two years by a single bank 
> transfer.
>
> I add the club member as a Customer.
>
> I write two invoices, one for each year. Account is 2110 (membership 
> fees < 300€).
>
> I book both invoices. Contra account is 0655 (claims from club matters).
>
> In 0950 (bank account I), i have a split entry.
> 0950                    240€
>          0655                   120€
>          0655                   120€
>
> Now i want to assign the payment to the invoices. I hoped that i could 
> mark the penultimate line and assign it to one invoice, then mark the 
> ultimate line and assign it to the other invoice.
>
> But this fails. When i assign the penultimate line to the proper 
> invoice, the amount in the first line is set to 120€, and the last 
> line is cleared.
>
> How can i assign the split payment to two invoices?

I am not an expert on these business features of GnuCash. But the author 
of them is an expert, and they sometimes respond to questions here.

I did have a somewhat related question about payments on invoices in 
December 2024. Here are the relevant answers:

<https://lists.gnucash.org/pipermail/gnucash-user/2024-December/114830.html> 
on Tue, 31 Dec 2024 11:17:49 +0100,
<https://lists.gnucash.org/pipermail/gnucash-user/2024-December/114831.html> 
on Tue, 31 Dec 2024 16:48:34 +0100.

and here is the archive of the entire thread: 
<https://lists.gnucash.org/pipermail/gnucash-user/2024-December/114779.html>.

What I took away from that conversation is that the invoice payments 
feature of GnuCash covers the most common and important use case, but 
not all use cases. It doesn't cover my case, where my payments service 
deducts transaction fees from my customer's invoice payment. Maybe it 
does not cover your case, where you want one invoice to be covered by 
two payments instead of one.

I hope this is helpful. Good luck!
      —Jim DeLaHunt, Vancouver, Canada