PRESS RELEASE

LAS VEGAS, April 22 /PRNewswire-FirstCall/ -- 2009 ETA Annual Meeting & Expo -- CyberSource Corporation (Nasdaq: CYBS) today announced that its Authorize.Net small business solution will be releasing Advanced Fraud Detection Suite (AFDS), a robust, rules-based fraud detection system that allows online merchants to identify and handle suspicious transactions using multiple filters, tools and custom settings.

According to CyberSource's 10th Annual Online Fraud Report, U.S. merchants lost an estimated $4 billion to fraud in 2008. The Advanced Fraud Detection Suite was specifically built to provide small business merchants with tools to better combat online fraud while saving legitimate orders from being rejected. The original Fraud Detection Suite, launched in 2005, included seven powerful transaction filters and IP tools. AFDS adds five additional filters:

-- Address Verification Service Filter -TheAddress Verification Service (AVS) is a standard feature of the Authorize.Net Payment Gateway that compares the address submitted with an order to the address on file with the customer's payment card issuer. Merchants can then choose to accept or reject transactions based on AVS response codes. AFDS includes a new AVS filter that assists the decision process by allowing merchants the additional options of flagging AVS transactions for monitoring purposes, or holding them for manual review. -- Card Code Verification Filter - Like AVS, Card Code Verification (CCV) is a standard feature of the Authorize.Net Payment Gateway. CCV uses a payment card's three- or four-digit number to validate customer information on file with the card association. Like the AVS Filter, the CCV filter allows merchants the additional options of flagging transactions for monitoring purposes, or holding them for manual review. -- Shipping Address Verification Filter -Verifies that the shipping address received with an order is a valid address with the U.S. Postal Service. -- IP Shipping Address Mismatch Filter -This filter compares the shipping address provided with an order to the order's originating IP address. This helps to determine whether or not the order is shipping to the country from which it originated. -- Regional IP Address Filter -Allows merchants to flag orders coming from specific regions or countries. Merchants can choose to customize the filter actions for a broad geographic region, or modify their fraud strategy country by country.

Authorize.Net is also releasing a new Daily Velocity Filter to its entire merchant base at no additional charge. The Daily Velocity Filter allows merchants to specify a threshold for the number of transactions allowed per day, a useful tactic in identifying high-volume fraud attacks.

Like its predecessor, the Fraud Detection Suite, AFDS enables merchants to customize filter settings to match individual business needs and control how the payment gateway handles suspicious transactions, including the ability to hold a transaction for manual review. A description of the original seven filters, as well as more on AFDS can be found at http://www.authorize.net/afds.

"eCommerce fraud remains a significant area of concern for merchants of all sizes," stated John Bodine, VP, Sales and Marketing, Small Business. "The new filters available with the Advanced Fraud Detection Suite are an important upgrade for merchants looking to protect themselves from fraud and potentially minimize their losses, and reflect CyberSource's long commitment to providing advanced fraud management for all our customers, from small to enterprise. Additionally, we're happy to offer the Daily Velocity Filter as a standard payment gateway feature so all of our merchants can utilize another tool to help safeguard their business."

Authorize.Net Advanced Fraud Detection Suite is expected to be available in May. Resellers attending the Electronic Transactions Association (ETA) Annual Meeting and Expo are invited to stop by booth