Back charges senario , how to map????

Question

Hello friends,
I need help to map below scenario in SAP:
We have third party business process, where vendor V1 is supplying material to customer. When customer receives material; V1 invoices us and we make payments to V1.At this point PO is closed for vendor V1.
Now if customer faces any problem with material, then we call local vendor V2 to repair or service the material. What ever charges come from local vendor is suppose to reimburse by vendor V1.
Now how can we link V2 vendor invoice amount to V1 invoice. What will be the document flow? How to map back charge process .
Note:
We have considered adding negative line items to the existing PO but understand this is not possible once payment has been issued and the PO is closed.
We have considered creating a u201Creverse sales orderu201D but do not want to create a separate order or handle the vendor under a separate sold-to account (as a customer)
We have considered a manual FI invoice but do not want to handle the vendor under a separate sold-to account (as a customer)
Seeking valuable inputs from experts.
Regards
Ravi

Answer 1

Hi,
Option 1
If you are using QM Module, you can create a notification (Customer Compliant, Vendor Compliant, Internal Problem so on) with reference to Material Document / Sales Order / Production Order so on.
Option 2
If V2 Vendor exclusively for V1 Vendor, then you can use Head Office and Branch Office concepts in Vendor Master.
You can specify head office account number only for branch accounts. Materials that posts using the branch account number are automatically posted to the Head Office Account. The system records the branch account number in the line items.
PS: Neither transactions nor balances are kept in the branch account.
Option 3
At the time of Logistics Invoice Verification, post to different Vendor (subject to your finance / accounts clerance)
Bye,
Muralidhara