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Processing Grid Usage Invoices 
With the business process, you, in the role of the supplier, can electronically receive (or manually enter) incoming grid usage bills, budget billing requests, and other end customer documents, and have them automatically checked. If the check is successful, an aggregated bill is posted to the market partner’s (for example, the distributor’s) contract account in financial accounting. If there are errors, you can create a complaint and send it electronically or in paper form.
Bill receipt is logged and can be monitored.
The market partner (for example, the distributor) has provided the grid usage bills, the budget billing requests, or other documents electronically or in paper form.

The following process runs in SAP R/3:
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1. Receive grid usage invoices electronically or enter manually
In this step, you receive electronic bills, or you enter the data from paper bills using the bill entry transaction In addition to the bill data, you can also enter consumption data and upload it to the SAP IS-U system during the next bill processing. Manual bill entry includes a number of input help functions (for example, prepopulation of fields, automatic generation of billing line items, plausibility check for required-entry fields).
You can save the document once it has been received or entered successfully.
2. Process grid usage invoices
In this step, you process grid usage bills that already exist in the system. During processing, you can perform checks, enhance document data, and transfer document data to IS-U. Sample modules that you can use for project-specific checks are available for the individual steps. In the extensive check framework, you can define individual check values for price checks, for example. You can reverse or query incorrect documents. If the checks are successful, the data is prepared for posting to Financial Accounting.
You can use mass activities to process the documents and monitor them by their document status.
3. Post aggregated grid usage invoices
In this step, you (in the role of the supplier, for example) post the aggregated grid usage bills as a payable to the market partner’s (distributor’s) account.
The received bills from the market partner were checked, reversed, queried, or posted to accounting as payables to an aggregated account of the market partner. This payable can be cleared by outgoing payments in subsequent processes.