Press Release

ACI Worldwide Announces Expiration of HSR Waiting Period for ACI's Acquisition of Official Payments Holdings

October 18, 2013

NAPLES, Fla.--(BUSINESS WIRE)-- ACI Worldwide (NASDAQ: ACIW) announced today that the waiting period under the Hart-Scott-Rodino Antitrust Improvement Act of 1976 (the "HSR Act"), applicable to its proposed acquisition of Official Payments Holdings, Inc. (NASDAQ: OPAY), has expired.

As announced on September 23, 2013, ACI and Official Payments entered into a definitive agreement contemplating the acquisition of Official Payments by ACI pursuant to a tender offer to acquire all outstanding Official Payments common shares at $8.35 per share, net to the seller in cash. The expiration of the HSR Act waiting period satisfies one of the conditions of the tender offer. The completion of the tender offer remains subject to other conditions as set forth in the Tender Offer Statement on Schedule TO filed by ACI with the Securities and Exchange Commission (the "SEC") on October 4, 2013, as amended from time to time.

The tender offer will remain open for Official Payments shareholders to tender their shares until 12:00 midnight, New York City time, on Friday, November 1, 2013, unless extended in accordance with the merger agreement and applicable SEC rules. The offer to purchase and related documents have been filed with the SEC and can be viewed online at www.sec.gov.

About ACI Worldwide

ACI Worldwide powers electronic payments and banking for more than 2,600 financial institutions, retailers, billers and processors around the world. ACI software enables $13 trillion in payments each day, processing transactions for more than 250 of the leading global retailers, and 18 of the world's 20 largest banks. Through our comprehensive suite of software products and hosted services, we deliver a broad range of solutions for payments processing; card and merchant management; online banking; mobile, branch and voice banking; fraud detection; trade finance; and electronic bill presentment and payment. To learn more about ACI, please visit www.aciworldwide.com. You can also find us on Twitter @ACI_Worldwide.

Forward-Looking Statements

This press release contains forward-looking statements based on current expectations that involve a number of risks and uncertainties. All statements, other than statements of historical fact, are statements that could be deemed forward-looking statements, including statements about the planned completion of the tender offer and the merger. No forward-looking statement can be guaranteed and actual results may differ materially from those that ACI and Official Payments project. Numerous risks, uncertainties and other factors may cause actual results to differ materially from those expressed in any forward-looking statement, many of which are outside of the control of management. These factors include, but are not limited to: (1) the occurrence of any event, change or other circumstance that could give rise to the termination of the merger agreement; (2) successful completion of the proposed transaction on a timely basis; (3) the impact of regulatory reviews on the proposed transaction; (4) the outcome of any legal proceedings that may be instituted against one or both of ACI and Official Payments and others following the announcement of the merger agreement; (5) risks that the proposed transaction disrupts current plans and operations and the potential difficulties in employee retention as a result of the transaction; and (6) other factors described in ACI's and Official Payments' filings with the SEC, including their respective reports on Forms 10-K, 10-Q, and 8-K. Except to the extent required by applicable law, neither ACI nor Official Payments undertakes any obligation to revise or update any forward-looking statements, or to make any other forward-looking statements, whether as a result of new information, future results or otherwise.

Important Information

This communication is neither an offer to purchase nor a solicitation of an offer to sell securities. The tender offer for the outstanding shares of Official Payments common stock is being made only pursuant to a Tender Offer Statement on Schedule TO containing an offer to purchase, forms of letters of transmittal and other documents relating to the tender offer (the "Tender Offer Statement"), which ACI filed with the SEC on October 4, 2013. On October 4, 2013, Official Payments filed with the SEC a Solicitation/Recommendation Statement with respect to the tender offer (the "Recommendation Statement"). INVESTORS AND SECURITY HOLDERS ARE URGED TO READ BOTH THE TENDER OFFER STATEMENT AND THE RECOMMENDATION STATEMENT REGARDING THE OFFER, AS THEY MAY BE AMENDED FROM TIME TO TIME, BECAUSE THEY CONTAIN IMPORTANT INFORMATION THAT SHOULD BE READ CAREFULLY AND CONSIDERED BEFORE ANY DECISION IS MADE WITH RESPECT TO THE TENDER OFFER. Both the Tender Offer Statement and the Recommendation Statement have been mailed to shareholders of Official Payments free of charge. Shareholders of Official Payments may also obtain free copies of the Tender Offer Statement, the Recommendation Statement and other documents filed by ACI and Official Payments on the SEC's website at http://www.sec.gov.

© Copyright ACI Worldwide, Inc. 2013.

ACI Worldwide, ACI Worldwide Payment Systems, the ACI Worldwide logo and all ACI Worldwide product names are trademarks or registered trademarks of ACI Worldwide, Inc., or one of its subsidiaries, in the United States, other countries or both. Other parties' trademarks referenced are the property of their respective owners.

ACI Worldwide
John Kraft, 239-403-4627
Vice President, Investor Relations & Strategic Analysis
john.kraft@aciworldwide.com

Source: ACI Worldwide, Inc.

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Investor contacts

John Kraft, Head of Strategy & Finance
Email: john.kraft@aciworldwide.com

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