Address Verification 
You use address verification to avoid payment card fraud. The address verification system (AVS) confirms that a customer who wants to use a payment card to pay is, in fact, the card owner.
The system checks with the clearing house that the address on file for the customer matches the address he or she gives you during the transaction. The system then displays the check results in the transaction document.
Integration
AVS occurs at the same time as preauthorization or standard authorization. This is an optional function, primarily used in the United States.
Prerequisites
You have arranged AVS services with your clearing house.
In Customizing:
You have set the system response to AVS check results, by choosing
Customer Relationship Management 
Basic
Functions Payment Cards Business
Add-Ins Structure for Communication with Clearing
House 
.You have ensured the system settings in the activity above, by choosing
Customer Relationship Management
Basic Functions Payment Cards
Settings for Transactions Define
Checking Group .You have enabled entry of short texts that you can display in transactions to describe the results from the clearing house, by choosing
Customer Relationship Management Basic
Functions Payment Cards Settings
for Authorization Define Texts for Check Results.
Activities
When creating a payment card transaction, you (or the customer) enter the customer's address in addition to the card data.
The system displays the results of address verification on the Payment Form tab page in the transaction document. The results consist of several parts, such as address verification and zip code verification, and appear as alphanumeric codes, such as ZX or ZY.
Use input help to display short texts describing these codes. For example, ZX is displayed in the field Zip Code Check. When you useInput Help, you see that ZX stands for incorrect zip code.
According to Customizing settings, the system automatically responds to the address verification results. Possible responses include the following:
When any part of the address is incorrect, the system blocks further processing of the transaction.
When the zip code is incorrect, the system displays a warning but authorizes the transaction anyway.