
The reversal has to be carried out in a certain sequence. You have to start with the latest document and work backwards to earlier documents.
Objective

The reversal has to be carried out in a certain sequence. You have to start with the latest document and work backwards to earlier documents.

SAP delivers a sample workflow for bill complaints with the system (WS 20500045, ISUBIMRCOR02).

In addition to full, billing and invoicing reversal, there is also an adjustment reversal function.
Adjustment reversal enables you to recalculate the time period of the adjustment reversal billing document and thus create a correction bill. It allows you to to recalculate the time period of the adjustment reversal billing document and thus create a correction bill. The billing order is reconstructed and marked with the old billing document number.

When you rebill following an adjustment reversal, the billing lines of the old billing document are entered as negative along with the newly created billing lines. A differential bill is created.
The adjustment reversal can be carried out if, for example, there is only one incorrect billing document in the invoicing document. A full reversal would be unnecessary in this case.

The bill correction allows you to process multiple reversals in an overview.
All reversal options are integrated:
Full Reversal
Invoicing reversal
Adjustment reversal

SAP delivers a sample workflow for meter overflow in estimation (assessing) with the system (WS 20500105, ISU_ASSESS).
The workflow is started if the event UtilContract.Assessed is triggered (overestimation of meter reading results). The event belongs to the business object ISUCONTRCT (utility contract).
You can use this workflow as a template to create your own workflow.
A customer has received a bill and does not agree with the meter reading billed. It is too high due to a bad reading. The bill is fully reversed and recalculated.
The business partner’s existing bill must be checked and recalculated with the correct meter reading. Display the last periodic invoice document created in the previous exercise.
On HOME page, select Print Document Display App (transaction EA40).
Enter the Print Document Number created in the previous step and press Enter.
Check the consumption billed for the customer.
You can also find the invoice in the archive. Another possibility is to simulate the bill. This formats the form using data from the print document.
Perform the bill correction process: reverse the identified bill and invoice and change the meter reading value to reflect the right amount. Enter today’s date as the Posting Date. Maintain a Reversal Reason. Choose full reversal option and reverse the documents. Enter a new meter reading value and save the changes. Rebill the customer.
On HOME page, select Bill Correction App (transaction EABICO).
Enter the Print Document Number created in the previous step and choose Execute.
Enter today's date in the Posting Date field.
Enter a reversal reason Incorrect Meter Reading.
Select the checkbox FR (for all lines) for the invoice to be corrected.
Click on the Reverse button and check the log below for success information. Press Enter to accept the message about reconciliation key if it appears.
Click on the Display or Hide Meter Reading button.
Note the line which is now available for meter reading editing (in the middle of the screen). Change the meter reading result to a value lower than the current one (for example, 350 kWh).
Save the changes using the Save button on meter reading section.
Back in the top section, click on the Bill button to execute the rebilling. View the log for further information.
On the top session a new tab New Bill is available. You can view the new invoice through it. Compare the new invoice with the original invoice to identify any changes.