The Invoice Verification component is part of the Materials Management (MM) system. It provides the link between the MM component and the Financial Accounting, Controlling, and Asset Accounting components.

Invoice Verification in Materials Management serves the following purposes:

- It completes the materials procurement process - which starts with the purchase requisition, continues with purchasing and 
   goods receipt and ends with the invoice receipt 
- It allows invoices that do not originate in materials procurement (for example, services, expenses, course costs, etc.) to be 
  processed 
- It allows credit memos to be processed, either as invoice cancellations or discounts

Invoice Verification does not handle the payment or the analysis of invoices. The information required for these processes is passed on to other departments.

Invoice Verification tasks include:

- Entering invoices and credit memos that have been received 
- Checking the accuracy of invoices with respect to contents, prices, and arithmetic 
- Executing the account postings resulting from an invoice 
- Updating certain data in the SAP system, for example, open items and material prices 
- Checking invoices that were blocked because they varied too greatly from the purchase order

An example on how to enter an Invoice Receipts :-

Transaction code MRHR - MM Invoice Verification and Material Valuation 

First Screen

Document date  : Date of PO                             Company code  : 

Document type  : There are two standard document types in the standard system:
                        RE - The invoice is posted gross
                        RN - The invoice is posted net

Posting date       : Date of open period               Currency            : 

Purchase Order : PO Number

Second Screen

Posting 

Amount :   Enter the gross invoice amount           Tax code          :

Enter and then click Simulate button

Click Adjustment on/off button

Click Edit -> New item -> G/L Account

a) Enter the G/L Account Number and click whether Debit or Credit

b) Enter the Amount and Cost Center 

Repeat Step a) and b) if you have additional G/L Account Number

There must be no Variance and Balance must always be ZERO before you can save the entries.

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