Exhibit 99.1

                                                                    News Release

TRANSACTION SYSTEMS ARCHITECTS INC
224 SOUTH 108 AVENUE
OMAHA, NEBRASKA 68154
402.334.5101
FAX 402.390.8077


For more information contact:
William J. Hoelting
Vice President, Investor Relations
402.390.8990

FOR IMMEDIATE RELEASE

               Transaction Systems Architects Reports Fiscal 2003
                             Fourth Quarter Results

Highlights -
  o Revenue of $71.8 million and EPS of $.25
  o Operating income of $11.9 million; operating margin of 16.5 percent
  o Twelve-month revenue backlog of $232.8 million
  o Cash balance of $114.0 million
  o Twenty-five new customers signed during the quarter
  o Initiating fiscal 2004 revenue guidance of $266 to $287 million and EPS
    guidance of $.60 to $.72


(OMAHA, Neb.--October 28, 2003)--Transaction Systems Architects, Inc. (Nasdaq:
TSAI), a leading global provider of enterprise e-payments and e-commerce
software, announced today that revenue for the fourth quarter ended September
30, 2003 was $71.8 million. Net income for the quarter was $9.1 million, or
$.25 per diluted share. The results for the quarter also include $2.0 million
in restructuring charges associated with staff reductions.

For the fourth quarter of fiscal 2003, revenues were comprised of software
license fees of $36.6 million, maintenance fees of $20.5 million and services
fees of $14.7 million. The Company's recurring revenue was $43.1 million, or 60
percent of revenue, and non-recurring revenue was $28.7 million, or 40 percent
of revenue. Recurring revenue consisted of monthly license fees of $21.4
million, maintenance fees of $20.5 million and facilities management fees of
$1.2 million. Operating income was $11.9 million with an operating margin of
16.5 percent.

During the quarter, the Company added 25 new customers and increased its
worldwide presence to 73 countries. For ACI Worldwide, the Company's largest
business unit, new customer activity for the quarter included the following:
four customers for BASE24(R), one customer for BASE24-es(TM), two customers for
ACI Proactive Risk Manager(TM), five WINPAY24(TM) customers and one customer for
NET24(TM). ACI Worldwide also licensed capacity upgrades to 12 customers and
licensed 14 new applications to existing customers during the fourth quarter.

Insession Technologies, the Company's e-infrastructure business unit, added 12
new customers and licensed nine new applications to existing customers during
the quarter. IntraNet, the Company's corporate banking software provider
expanded its relationship with twenty existing customers and sold four capacity
upgrades during the quarter.

The Company completed the fourth quarter of fiscal 2003 with $232.8 million in
backlog, an increase of $6.9 million sequentially, consisting of $167.1 million
in recurring backlog and $65.7 million in non-recurring backlog. Recurring
backlog includes monthly license fees, maintenance fees and facilities
management fees specified in executed contracts to the extent that the Company
believes that recognition of the related revenue will occur within one year.
Non-recurring backlog includes all other fees specified in executed contracts to
the extent that the Company believes that recognition of the related revenue
will occur within one year.

For the fiscal year ended September 30, 2003, the Company's revenues were $277.3
million, compared to $284.7 million for fiscal 2002. Operating income in fiscal
2003 was $35.3 million, compared to $41.7 million in fiscal 2002.

Net income for the year ended September 30, 2003 was $14.3 million, or $.40 per
diluted share, compared to $15.3 million, or $.43 per diluted share, for fiscal
2002. The operating results for fiscal 2003 and 2002 reflect goodwill impairment
charges of $9.3 million and $1.5 million, respectively, which are not tax
deductible, related to the 2001 acquisition of MessagingDirect Ltd. As a result
of on-going tax planning initiatives, the Company has reduced its effective tax
rate for fiscal 2003.

"The Company's quarterly results reflected a number of new customer contracts
and our continuing efforts to manage operating expenses," said Gregory D.
Derkacht, President and CEO. "As we look forward to fiscal 2004, we believe the
Company is well positioned, based on its leadership role in the e-payments and
e-commerce market, its newer open-system multi-platform solution and its
strengthened balance sheet."

The Company's revenue estimate for fiscal 2004 is $266 million to $287 million,
and its EPS estimate is $.60 to $.72.

The Company will provide further details regarding its financial performance for
the fourth quarter of fiscal 2003 in its scheduled teleconference to be held
Tuesday, October 28, 2003 at 4:00 pm CST. Interested persons may access a
real-time audio broadcast of the teleconference at:
www.tsainc.com/ir/ir.asp. The web cast will be archived for ten days after the
teleconference at the same web address listed above.

About Transaction Systems Architects, Inc.
The Company's software facilitates electronic payments by providing consumers
and companies access to their money. Its products are used to process
transactions involving credit cards, debit cards, secure electronic commerce,
mobile commerce, smart cards, secure electronic document delivery and payment,
checks, high-value money transfers, bulk payment clearing and settlement, and
enterprise e-infrastructure. The Company's solutions are used on more than 1,700
product systems in 73 countries on six continents.

Forward-Looking Statements

This press release contains forward-looking statements based on current
expectations that involve a number of risks and uncertainties. Generally,
forward-looking statements do not relate strictly to historical or current
facts, and include words or phrases such as "management anticipates," "the
Company believes," "the Company anticipates," "the Company expects," "the
Company plans," "the Company will," "the Company is well positioned" and words
and phrases of similar impact, and include but are not limited to statements
regarding future operations, business strategy and business environment. The
forward-looking statements are made pursuant to safe harbor provisions of the
Private Securities Litigation Reform Act of 1995. Forward-looking statements
included in this press release include statements regarding (i) the Company's
recurring and non-recurring backlog, (ii) the comment that "we believe the
Company is well positioned, based on its leadership position in the e-payments
and e-commerce market, its newer open-system multi-platform solution and its
strengthened balance sheet" and (iii) the Company's revenue estimate and EPS
estimate for fiscal 2004. Actual results could differ materially from that
contained in the forward-looking statements. Factors that could cause actual
results to differ include, but are not limited to, the following:

o        The Company's calculation of backlog is based on customer contracts
         that exist on the date of the calculation.  A number of factors may
         change after the date of calculation that could result in actual
         revenues being less than the amounts contained in backlog.  The
         Company's customers may attempt to renegotiate or terminate their
         contracts due to a number of factors, including mergers, changes in
         their financial condition, or general changes in economic conditions
         in the customer's industry or geographic location, or the Company may
         experience delays in the development of products or services
         specified in customer contracts.  Accordingly, there can be no
         assurance that contracts included in recurring or non-recurring
         backlog will actually generate the specified revenues or that the
         actual revenues will be generated within the one-year period.

o        The Securities and Exchange Commission (the "SEC") has issued a
         formal order of private investigation in connection with the
         Company's restatement of its prior consolidated financial
         statements.  Although the Company has fully cooperated with the SEC
         in this matter and intends to continue to fully cooperate, the SEC
         may determine that the Company has violated federal securities laws.
         The Company cannot predict when this investigation will be completed
         or what the outcome will be.  If the SEC makes a determination that
         the Company has violated federal securities laws, the Company may
         face sanctions including, but not limited to, significant monetary
         penalties and injunctive relief. The findings and outcome of the SEC
         investigation may affect the class action and derivative lawsuits
         that are pending.  There is risk that the investigation could result
         in substantial costs and divert management attention and resources,
         which could adversely affect the Company's business.

o        The Company is currently in the process of evaluating the claims made
         in various lawsuits filed against the Company relating to its
         restatement of prior consolidated financial results.  The Company
         intends to defend the foregoing lawsuits vigorously, but cannot
         predict the outcome and is not currently able to evaluate the
         likelihood of its success or the range of potential loss, if any.
         However, if the Company were to lose these lawsuits or if they were
         not settled on favorable terms, the judgments or settlements could
         have a material adverse effect on its consolidated financial
         position, results of operations and cash flows.

o        The Company has insurance that provides an aggregate coverage of
         $20.0 million for the period during which the above-described
         lawsuits were filed, but cannot evaluate at this time whether such
         coverage will be available or adequate to cover losses, if any,
         arising out of these lawsuits.  If these policies do not adequately
         cover expenses and certain liabilities relating to these lawsuits,
         the Company's consolidated financial condition, results of operations
         and cash flows could be materially harmed.  The Company's certificate
         of incorporation provides that it will indemnify and advance expenses
         to its directors and officers to the maximum extent permitted by
         Delaware law.  The indemnification covers any expenses and
         liabilities reasonably incurred by a person, by reason of the fact
         that such person is or was or has agreed to be a director or officer,
         in connection with the investigation, defense and settlement of any
         threatened, pending or completed action, suit, proceeding or claim.

o        New accounting standards, or additional interpretations or guidance
         regarding existing standards, could be issued in the future, which
         could lead to unanticipated changes in the Company's current financial
         accounting policies. These changes could affect the timing of revenue
         or expense recognition and cause fluctuations in operating results.

o        The Company has recently undertaken an extensive tax-planning project
         to study and implement an effective tax structure for the Company's
         business operations and its intercompany pricing for software
         licenses and services.  The Company derives a substantial amount of
         its revenues from its international operations.  The Company's
         effective tax rate is calculated taking into consideration the tax
         rates in the United States and the various countries in which the
         Company derives revenues and takes into consideration, among other
         matters, the intercompany pricing of software licenses and services
         between the Company's various business entities.  The intercompany
         pricing of these software licenses and services is subject to audit
         by the various income tax authorities in the countries in which the
         Company conducts business.  The Company has retained tax advisors
         with expertise in tax matters to advise the Company on its tax
         structure, intercompany pricing, and other tax policies and
         procedures, and plans to pursue advance pricing agreements in certain
         jurisdictions with respect to its intercompany pricing.  However,
         there can be no assurance that the various tax authorities in the
         countries in which the Company conducts business will agree with the
         Company's intercompany pricing or other tax policies and procedures.
         In the event that its intercompany pricing or any of its tax policies
         and procedures are challenged by any of the various taxing
         authorities, the Company's effective tax rate could be adversely
         affected, which may have an adverse impact on the Company's net
         income.

o        No assurance can be given that operating results will not vary.
         Fluctuations in quarterly operating results may result in volatility
         in the Company's stock price.  The Company's stock price may also be
         volatile, in part, due to external factors such as announcements by
         third parties or competitors, inherent volatility in the technology
         sector and changing market conditions in the industry.  The Company's
         stock price may also become volatile, in part, due to the various
         lawsuits filed against the Company relating to its restatement of
         prior financial results and the announced SEC formal order of private
         investigation related to the Company's restatement of its prior
         consolidated financial statements.

o        The Company will continue to derive a majority of its total revenue
         from international operations and is subject to risks of conducting
         international operations including: difficulties in staffing and
         management, reliance on independent distributors, longer payment
         cycles, volatilities of foreign currency exchange rates, compliance
         with foreign regulatory requirements, variability of foreign economic
         conditions, and changing restrictions imposed by U.S. export laws.

o        The Company will continue to derive a substantial majority of its total
         revenue from licensing its BASE24 family of software products and
         providing services and maintenance related to those products. Any
         reduction in demand for, or increase in competition with respect to,
         BASE24 products would have a material adverse effect on the Company's
         financial condition and results of operations.

o        Prior to its May 2002 merger with HP, Compaq Computer Corporation
         announced a plan to consolidate its high-end performance enterprise
         servers on the Intel Corp. Itanium microprocessor by 2004. The Company
         has not determined whether consolidation of the high-end servers, if it
         occurs as announced, will materially affect the Company's business,
         financial position or results of operations.

o        The Company will continue to derive a substantial portion of its
         revenues from licensing of software products that operate on HP NonStop
         Himalaya servers. Any reduction in demand for these servers or in HP's
         ability to deliver products on a timely basis could have a material
         adverse effect on the Company's financial condition and results of
         operations.

o        The Company's business is concentrated in the banking industry, making
         it susceptible to a downturn in that industry. Further, banks are
         continuing to consolidate, decreasing the overall number of potential
         buyers of the Company's products and services.

Any or all of the forward-looking statements may turn out to be wrong. They can
be affected by inaccurate assumptions or by known or unknown risks and
uncertainties. Many of these factors will be important in determining the
Company's actual future results. Consequently, no forward-looking statement can
be guaranteed. Actual future results may vary materially from those expressed or
implied in any forward-looking statements.

These cautionary statements and any other cautionary statements that may
accompany such forward-looking statements, whether written or oral, expressly
qualify all of the forward-looking statements. In addition, the Company
disclaims any obligation to update any forward-looking statements after the date
of this release unless applicable securities laws require it to do so.

For a detailed discussion of these and other risk factors, interested parties
should review the Company's filings with the Securities and Exchange Commission,
including the Company's Form 10-K filed on January 13, 2003, the Company's Form
10-Q filed on February 13, 2003, the Company's Form 10-Q filed on May 15, 2003
and the Company's Form 10-Q filed on August 14, 2003.






                      TRANSACTION SYSTEMS ARCHITECTS, INC.
                           CONSOLIDATED BALANCE SHEETS
                                 (in thousands)

                                                  September 30,    September 30,
                                                       2003             2002
                                                  -------------    -------------
                                                             
                                     ASSETS

Current assets:
  Cash and cash equivalents                         $ 113,986        $  87,894
  Marketable securities                                 1,296            3,757
  Billed receivables, net                              42,225           35,755
  Accrued receivables                                   9,592           13,132
  Recoverable income taxes                             16,194                -
  Deferred income taxes, net                           10,316           17,554
  Other                                                 5,104            5,192
                                                    ---------        ---------
    Total current assets                              198,713          163,284

Property and equipment, net                             9,405           11,597
Software, net                                           2,319            5,609
Goodwill, net                                          46,425           55,947
Deferred income taxes, net                              5,429           27,546
Other                                                   1,609            3,168
                                                    ---------        ---------
    Total assets                                    $ 263,900        $ 267,151
                                                    =========        =========

                      LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
  Current portion of debt - financing agreements    $  15,493        $  18,444
  Accounts payable                                      6,965            7,348
  Accrued employee compensation                         9,822            7,583
  Accrued liabilities                                   9,714           12,126
  Income taxes payable                                      -            7,847
  Deferred revenue                                     70,798           59,598
  Other                                                   628              872
                                                    ---------        ---------
    Total current liabilities                         113,420          113,818

Debt - financing agreements                             9,444           24,866
Deferred revenue                                       17,689           23,860
Other                                                     473            1,749
                                                    ---------        ---------
    Total liabilities                                 141,026          164,293
                                                    ---------        ---------
Stockholders' equity:
  Class A Common Stock                                    186              183
  Treasury stock, at cost                             (35,258)         (35,258)
  Additional paid-in capital                          235,769          228,465
  Accumulated deficit                                 (69,602)         (83,927)
  Accumulated other comprehensive loss, net            (8,221)          (6,605)
                                                    ---------        ---------
    Total stockholders' equity                        122,874          102,858
                                                    ---------        ---------
    Total liabilities and stockholders' equity      $ 263,900        $ 267,151
                                                    =========        =========








                      TRANSACTION SYSTEMS ARCHITECTS, INC.
                      CONSOLIDATED STATEMENTS OF OPERATIONS
                    (in thousands, except per share amounts)

                                         Three Months Ended              Year Ended
                                            September 30,               September 30,
                                       ----------------------      ----------------------
                                          2003         2002           2003         2002
                                       ---------    ---------      ---------    ---------
                                                                    
Revenues:
  Software license fees                $  36,611    $  39,301      $ 146,825    $ 158,453
  Maintenance fees                        20,447       18,557         79,187       74,213
  Services                                14,720       12,882         51,279       52,001
                                       ---------    ---------      ---------    ---------
    Total revenues                        71,778       70,740        277,291      284,667
                                       ---------    ---------      ---------    ---------
Expenses:
  Cost of software license fees            6,933        7,215         25,500       31,053
  Cost of maintenance and services        15,767       15,113         61,350       62,479
  Research and development                 9,588        8,351         35,373       35,029
  Selling and marketing                   13,531       14,350         54,482       57,352
  General and administrative              14,105       16,570         56,037       55,563
  Impairment of goodwill                       -        1,524          9,290        1,524
                                       ---------    ---------      ---------    ---------
    Total expenses                        59,924       63,123        242,032      243,000
                                       ---------    ---------      ---------    ---------
Operating income                          11,854        7,617         35,259       41,667
                                       ---------    ---------      ---------    ---------
Other income (expense):
  Interest income                            335          623          1,211        1,667
  Interest expense                          (573)      (1,220)        (2,998)      (5,596)
  Other, net                                 975       (4,048)           140          (26)
                                       ---------    ---------      ---------    ---------
    Total other income (expense)             737       (4,645)        (1,647)      (3,955)
                                       ---------    ---------      ---------    ---------
Income before income taxes                12,591        2,972         33,612       37,712
Income tax provision                      (3,478)      (1,915)       (19,287)     (22,443)
                                       ---------    ---------      ---------    ---------
Net income                             $   9,113    $   1,057      $  14,325    $  15,269
                                       =========    =========      =========    =========

Earnings per share information:

  Weighted average shares outstanding:

    Basic                                 35,739       35,396         35,558       35,326
                                       =========    =========      =========    =========
    Diluted                               36,438       35,562         35,707       35,572
                                       =========    =========      =========    =========
  Earnings per share:

    Basic                              $    0.25    $    0.03      $    0.40    $    0.43
                                       =========    =========      =========    =========
    Diluted                            $    0.25    $    0.03      $    0.40    $    0.43
                                       =========    =========      =========    =========