IN THE COURT OF CHANCERY OF THE STATE OF DELAWARE

                        IN AND FOR NEW CASTLE COUNTY

ANNETTE ROTI,                               )
                                            )
                           Plaintiff,       )
                                            )
         v.                                 )
                                            )        Civil Action No. 19707-NC
OFFICIAL PAYMENTS CORPORATION,              )
ANDREW COHAN, THOMAS R. EVANS,              )
JOHN R. HAGGERTY, JOHN D. LEWIS,            )
LEE E. MICKLES, BRUCE S. NELSON,            )
TIER TECHNOLOGIES, INC. and                 )
KINGFISH ACQUISITION                        )
CORPORATION,                                )
                                            )
                           Defendants.      )


                                 COMPLAINT

1.   This is an action on behalf of the public stockholders of Official
     Payments Corporation ("OPay" or the "Company"), seeking an injunction
     and other relief for defendants' breach of fiduciary duty of
     disclosure and violation of 8 Del. C.,ss.203 in connection with the
     proposed acquisition of OPay by Tier Technologies, Inc. ("Tier"). Tier
     is proposing to acquire OPay by means of a tender offer scheduled to
     close on July 9, 2002 which will be followed by a second step merger.

                                THE PARTIES

2.   Plaintiff is and has at all relevant times been a stockholder of OPay.

3.   Defendant OPay, a Delaware corporation, is a leading provider of
     electronic payment options to government entities. OPay has
     approximately 23 million shares of stock outstanding which are traded
     on NASDAQ. Comerica, Inc. ("Comerica"), Beranson Holdings Inc.
     ("Beranson") and Michaella Stern ("Stern") collectively own or control
     more than 63% of OPay's outstanding shares. Comerica owns 12,000,000
     shares (52%), Beranson (which is owned by Stern) owns 2,642,000 shares
     and Stern, the widow of OPay's founder, individually holds options to
     purchase another 199,252 shares.

4.   Defendant Andrew Cohan has at all relevant times been a director of
     OPay.

5.   Defendant Thomas R. Evans ("Evans") has at all relevant times been the
     Chairman of the Board of Directors and Chief Executive Officer of
     OPay.

6.   Defendant John D. Lewis has at all relevant times been a director of
     OPay. In addition, since January 1994 he has been Vice Chairman and
     Director of Comerica. Lewis is also the Vice Chairman of Comerica Bank
     and has held that position since March 1995.

7.   Defendant John R. Haggerty has at all relevant times been a director
     of OPay. He is Executive Vice President of Comerica. He has worked for
     Comerica since at least 1994.

8.   Defendant Lee E. Mickles has at all relevant times been a director of
     OPay.

9.   Defendant Bruce S. Nelson has at all relevant times been a director of
     OPay.

10.  Defendant Tier is a California corporation.

11.  Defendant Kingfish Acquisition Corporation ("Kingfish") is a Delaware
     corporation. Kingfish is a wholly-owned subsidiary of Tier and was
     formed for the sole purpose of acquiring on behalf of Tier all of the
     outstanding shares of OPay's common stock.

                            FACTUAL ALLEGATIONS

12.  In early May 2002, Tier made a preliminary offer to purchase OPay for
     approximately $3 per share. That offer is an extremely low price. OPay
     went public in November 1999 at a price of $15 per share. OPay
     currently has cash and cash equivalents of more than $45 million (or
     approximately $2 per share) and working capital of more than $40
     million. The $3 per share offer effectively places the ridiculously
     low value of approximately $20 million on OPay's business.

13.  Tier was only willing to proceed with its low-ball deal if it could
     "lockup" the shares owned by OPay's large stockholders, Comerica,
     Beranson and Stern. In approximately mid-May, 2002, Tier sent a form
     of stockholders agreement directly to Comerica, Beranson and Stern and
     their representatives negotiated and reached an agreement, arrangement
     or understanding with respect to that stockholders agreement prior to
     May 30, 2002.

14.  On May 30, 2002, OPay's board approved an Agreement and Plan of Merger
     ("Agreement") with Tier and its wholly-owned subsidiary Kingfish.
     Pursuant to the Agreement, Kingfish commenced a cash tender offer to
     purchase all of the outstanding shares of OPay's common stock at a
     price of $3.00 per share. The Agreement further provides that assuming
     at least 90% of OPay's shares are tendered, Tier and Kingfish will
     engage in a short-form merger pursuant to which the remaining
     outstanding shares of OPay will be cashed out for the same low price
     of $3.00 per share.

15.  On May 30, 2002, the OPay board also approved the stockholders
     agreement that Tier, Comerica, Beranson and Stern had previously
     agreed on pursuant to which the latter three agreed, inter alia, to
     tender all of their shares to Kingfish pursuant to the tender offer.

16.  On June 11, 2002, Tier and Kingfish commenced the tender offer and
     filed form SC-TO-T with the Securities and Exchange Commission
     ("SEC"). On that same day, OPay filed its Schedule 14D-9 with the SEC.
     The tender offer is currently scheduled to close on July 9, 2002.

17.  Neither the SC-TO-T nor the 14D-9 include financial statements for
     OPay. The SC-TO-T and 14D-9 disclose virtually no financial
     information at all about OPay from which a reasonable stockholder
     could make a fully informed investment decision. The 14D-9 does
     indicate that OPay's board received a fairness opinion from an
     investment banker, CIBC World Markets ("CIBC"), but does not disclose
     anything about how CIBC reached its conclusion. The disclosures made
     to the Class are deficient for these and other reasons discussed
     below.

                        PLAINTIFF'S CLASS ALLEGATION

18.  Plaintiff brings this action on behalf of herself and all other
     persons who own common stock of OPay (the "Class") as a class action
     pursuant to Delaware Chancery Court Rule 23.

19.  This class action is properly maintained under Delaware Chancery Court
     Rule 23.

20.  The members of the Class are so numerous and geographically dispersed
     that individual joinder is impracticable. OPay has approximately 23
     million shares outstanding that are owned by shareholders living in
     many states across the United States.

21.  Common questions of law and fact exist as to all members of the Class.
     These common questions predominate over any questions which affect
     individual members of the Class and include, without limitation,
     whether defendants breached their disclosure duties and otherwise
     engaged in the violations of law alleged herein.

22.  Plaintiff will fairly and adequately protect the interests of the
     Class. Plaintiff has no interests adverse to the interests of the
     Class members. Plaintiff has sufficient incentive to prosecute this
     action diligently for herself and on behalf of the Class. Plaintiff
     has retained counsel competent and experienced in class action
     litigation and intend to pursue this action vigorously.

23.  This class action is an appropriate method for the fair and efficient
     adjudication of the claims asserted herein. Repetitive individualized
     litigation would impose an unnecessary burden on Class members and the
     court system. This class action is not expected to present any
     significant management difficulties and focuses, by definition, on the
     uniform and consistent action of the defendants.

                                  COUNT I
                  (BREACH OF FIDUCIARY DUTY OF DISCLOSURE)

24.  The foregoing allegations are repeated and reallegcd as if fully set
     forth herein.

25.  The individual defendants owe to plaintiff and the Class a fiduciary
     duty which requires them to disclose all material facts to OPay's
     stockholders in connection with the tender offer. Because of the way
     this transaction has been structured, the 14D-1 communicates the
     directors' approval and recommendation of the Agreement to the
     Company's stockholders and is the only communication OPay's
     stockholders have or will receive from their directors in connection
     with this transaction. Delaware law requires that directors who
     disclose such a recommendation also disclose such information about
     the background of the transaction, the process followed by them to
     maximize value in the sale, and their reasons for approving the
     transaction so as to be materially accurate and complete. The
     defendants are breaching their fiduciary duty of disclosure in at
     least the following respects;

                  A. No financial information about OPay has been disclosed
         to the Class in connection with the tender offer. No financial
         statements or other organized presentations of financial
         information are included in the 14D-9 or SC-TO-T. OPay is a
         company with more than $45 million in cash and cash equivalents
         ($2 per outstanding share of OPay) and more than $40 million in
         working capital. OPay just recently completed a restructuring.
         Under the circumstances, a reasonable stockholder needs detailed
         financial statements and up-to-date financial projections to be
         able to make a fully informed investment decision as to whether to
         tender into the $3 per share tender offer.

                  B. The disclosure of the reasons for the OPay board's
         recommendation that the stockholders tender into the tender offer
         are materially misleading and/or materially incomplete. The
         purported "reasons" disclosed are actually just a list of topics
         the board supposedly considered. What the stockholders need to
         know and are entitled to know is why the board believes that $3
         per share is a good deal, assuming they in fact believe that.
         Instead of making that disclosure, the 14D-9 indicates, for
         example, that "The Company Board also took into account that the
         Company's current cash position and the continued low market price
         of the Common Stock made it more expensive and difficult for the
         Company to complete strategic acquisitions (including, with
         respect to expansion of the Company's revenue base and attainment
         of operational efficiencies)." (14D-9 at p. 5). That is misleading
         without an explanation of what it was about the Company's "cash
         position" that was deemed to be a problem. The Company has $45
         million in cash and cash equivalents and $40 million in working
         capital (facts that are not disclosed). The Company has plenty of
         cash and is not going to run out of cash any time soon.

                  C. The 14D-9 indicates that CIBC opined that the $3 per
         share offer is fair, but there is no disclosure of the
         methodologies that CIBC employed in reaching that conclusion. The
         14D-9 simply refers to the attached CIBC opinion letter which
         merely states that the offer is "fair," subject to two pages of
         qualifications. That letter does not explain why or how CIBC
         concluded that the $3 per share offer is fair. Since the OPay
         board disclosed that one of the primary factors they relied on in
         recommending that stockholders tender was the CIBC opinion, and
         since the offer is only slightly higher than the cash and cash
         equivalents that the Company has on hand, an explanation of the
         methodologies that CIBC employed in reaching its opinion is
         material.

                  D. The 14D-9 fails to disclose what will happen to
         Comerica's agreements with OPay following the acquisition. OPay
         has agreements with Comerica pursuant to which Comerica is paid
         millions of dollars per year ($8.2 million in 2001) for credit
         card processing and settlement services. Therefore, Comerica is in
         a very different situation from other OPay stockholders. Its
         decision to sell its stock to a particular buyer is influenced by
         its desire to continue its lucrative credit card processing
         contracts. The 14D-9 fails to disclose what will become of those
         agreements following the acquisition of the Company by Tier.

                  E. The 14D-9 states that: "The Company Board also
         considered the information provided by CIBC World Markets and the
         Company's management concerning discussions with other potential
         acquirors and strategic investors since April 2001. The Company
         Board noted that none of those discussions had resulted in
         proposals to acquire the Company that were as favorable to the
         Company and its stockholders as the Offer and the Merger." That
         disclosure is materially incomplete. The board had a duty to
         obtain the maximum value reasonably available in connection with
         the sale of the Company. The stockholders are therefore entitled
         to a full and fair summary of the process followed by the board,
         including an explanation of any other offers that were received,
         so that the stockholders can evaluate for themselves whether the
         board acted reasonably to maximize value in the sale.

26.  The omitted and misstated information discussed above is material
     because a reasonable OPay stockholder needs that information to be
     able to make a fully informed assessment of whether to tender his, her
     or its shares pursuant to the tender offer.

27.  Plaintiff and the Class will suffer irreparable harm as a result of
     defendants' inadequate disclosures, and have no adequate remedy at law
     for defendants' breaches of fiduciary duty.

                                  COUNT II

                      (VIOLATION OF 8 DEL. C. ss.203)

28.  The foregoing allegations are repeated and realleged as if fully set
     forth herein.

29.  Tier and Kingfish are violating 8 Del. C.ss.203.

30.  Under ss.203, Tier and Kingfish are required to obtain the affirmative
     vote of 66-2/3% of the disinterested stockholders before effecting a
     "business combination" with OPay unless the OPay board approved Tier
     and Kingfish becoming an interested stockholder prior to when they
     became an interested stockholder.

31.  Tier and Kingfish became an interested stockholder prior to May 30,
     2002 when they reached an agreement, arrangement or understanding with
     Comerica on the terms of the stockholders agreement. It was not the
     formal execution of the stockholders agreement that caused Tier and
     Kingfish to become an interested stockholder, it was the agreement,
     arrangement and/or understanding that Tier, Kingfish and Comerica
     reached prior to May 30 that agreement was acceptable to both parties
     that caused Tier and Kingfish to become an interested stockholder. The
     OPay board did not approve Tier and Kingfish becoming an interested
     stockholder prior to May 30, 2002. Accordingly, the protections of
     ss.203 apply and Tier and Kingfish are prohibited from affecting a
     business combination with OPay for 3 years without first obtaining the
     affirmative vote of 66-2/3 of OPay's disinterested stockholders.


                             PRAYERS FOR RELIEF
         WHEREFORE, Plaintiff respectfully requests that the Court grant the
following relief:

1.   Certify this action as a class action and plaintiff as the
     representative of the Class and her attorneys as counsel for the
     Class;

2.   Enjoin the tender offer or award rescissory and/or monetary damages;

3.   Order such other relief as the Court deems equitable and just,
     including an award of attorneys' fees and costs.


                                            PRICKETT, JONES & ELLIOTT, P.A.

                                            By: /s/Ronald. A. Brown, Jr.
                                                --------------------------------
                                                Ronald A. Brown, Jr.
                                                1310 King Street
                                                P.O. Box 1328
                                                Wilmington, DE  19899
                                                (302) 888-6500
                                                Attorneys for Plaintiffs


Of Counsel:

Arthur T. Susman
Charles R. Watkins
John R. Wylie
Susman & Watkins
Two First National Plaza, Suite 600
Chicago, Illinois  60603
(312) 346-3466

Dated:  June 19, 2002