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                                                FOR:    Tier Technologies, Inc.
                                                        1350 Treat Boulevard
                                                        Suite 250
                                                        Walnut Creek, CA 94596

                                            CONTACT:    Lori B. DePole, CFO
                                                        Barbara Pivnicka, CMO
                                                        925-937-3950
For Immediate Release
                                                        Corey Cutler/Kirin Smith
                                                        Morgen-Walke Associates
                                                        212-850-5600


      TIER TECHNOLOGIES RECEIVES EARLY TERMINATION OF WAITING PERIOD UNDER
       THE HART-SCOTT-RODINO ACT FOR THE PROPOSED ACQUISITION OF OFFICIAL
                              PAYMENTS CORPORATION


     Walnut Creek, CA, June 17, 2002 - Tier Technologies, Inc. (Nasdaq: TIER)
announced today that on June 14, 2002, it received early termination of the
waiting period required under the Hart-Scott-Rodino Act in connection with the
previously announced proposed acquisition of Official Payments Corporation
(Nasdaq: OPAY).

     Pursuant to an all cash tender offer, Tier is offering to acquire Official
Payments for $3.00 in cash per share of Official Payments common stock. Tier's
offer is scheduled to expire at 5:00 p.m., New York City time on Tuesday, July
9, 2002, unless extended.

     Tier is a vertically-focused consulting firm that provides business and
information technology consulting, systems design and integration, transaction
processing, business process outsourcing and business process reengineering for
its clients primarily in the state and local government, healthcare, insurance
and utilities markets. Tier brings specific industry knowledge, proven delivery
capability and proprietary applications to its client relationships. The
combination of domain expertise and technical capability allow Tier to provide
solutions that link increased operating efficiencies with systems and technology
improvements. Tier serves Fortune 1000 companies and government entities.

     This press release is neither an offer to purchase nor a solicitation of an
offer to sell securities. The tender offer is made only through the Offer to
Purchase and the related Letter of Transmittal which have been mailed to
stockholders. We urge investors and security holders to read the following
documents regarding the tender offer and merger because they contain important
information: (i) Tier's Tender Offer Statement on Schedule TO, including the
Offer to Purchase, Letter of Transmittal and Notice of Guaranteed Delivery and
(ii) Official Payment's Solicitation/Recommendation Statement on Schedule 14D-9.
These documents have been filed, and any amendments to these documents will be
filed, with the United States Securities and Exchange Commission, and may be
obtained for free at the SEC's website (www.sec.gov). You may also obtain for
free each of these documents from Mellon Investor Services at (866) 323-8166 and
44 Wall Street, 7th Floor, New York, New York 10005.

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                             Tier...Expect A Lot(sm)