Deallocate a credit note from an invoice in 2005

Question

Client needs to be able to deallocate credit notes raised from invoices when posting a payment to help with later reconciliation.
Example: The client has 3 invoices for £100 and a credit raised from the most recent invoice for £50.
The client then pays 2 of the due invoices, less the value of the credit note (£150)
The try to allocate the cash but cannot allocate £150 to the 2 oldest invoices plus the credit note as the credit note is already allocated against the later invoice.
The client has allocated it in such a way in their system, and we should attempt to match it. Therefore, we cannot allocate the payment against one of the 2 earlier invoices and the balance of the last invoice.
Apparently this is very common so adding this as a On Account Payment is messy for lots and lots of accounts.
A much better solution for my client would be to disassociate the invoice and credit upon posting the payment.

Answer 1

Dear Carlos Mario Cuartas
You can think about below procedures for your question.
A. Create Credit Note (by Invoicing procedure)
   1) Selection Type
    When you try to progress rent invoices by using SAP RE Std.Transaction
    (T-Code: RERAIV - Create Invoices ), you can consider about below two selection type :
       a) Selection using FI documents
        --> That is for actual invoice based on the billing(posted) documents.
             & you can define the "Invoice Correspondence" (Include Detail)
       b) Selection using planned items of the cash flow
        --> That is for planned invoice as pro forma invoice (just first time)
             & you can define the another "Correspondence" for this format. (Not Detail)
   2) Summarize Invoices
        a) Per recipient (can involve several contracts)
      --> If the selected business partner has multiple contracts, then the items of all contracts
           are grouped into one invoice.
      b) Per contract
      --> If the selected business partner has multiple contracts, then the items of each contract
           are grouped into separate invoices.
B. Print-Out Format for the Credit Note
    You can define and design the "Correspondence of credit note" as below,
      - Go to RECACUST >> Correspondence > PDF-Based Forms (Mass Print and Single Print) >
                                         Forms > Define Forms
      - Go to RECACUST >> Correspondence > PDF-Based Forms (Mass Print and Single Print) >
                                         Correspondence Activities > Define Correspondence Activities
Regards,
Jeong, Yeong-Chul.