UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549



                                    FORM 8-K

                                 CURRENT REPORT


     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934


                         Date of Report: April 27, 2004
                        (Date of earliest event reported)


                            -------------------------



                      TRANSACTION SYSTEMS ARCHITECTS, INC.
             (Exact name of registrant as specified in its charter)



          Delaware                   0-25346                      47-0772104
(State or other jurisdiction       (Commission                (I.R.S. Employer
      of incorporation)            File Number)              Identification No.)


                             224 South 108th Avenue,
                              Omaha, Nebraska 68154
          (Address of principal executive offices, including zip code)


                                 (402) 334-5101
              (Registrant's telephone number, including area code)


                            -------------------------




Item 7. Financial Statements and Exhibits. (c) Exhibits. Exhibit Number Description 99.1 Press Release, dated April 27, 2004. Item 12. Results of Operations and Financial Condition. On April 27, 2004, Transaction Systems Architects, Inc. issued a press release announcing its results for the quarterly period ending March 31, 2004. A copy of this press release is attached hereto as Exhibit 99.1.

SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. TRANSACTION SYSTEMS ARCHITECTS, INC. Date: April 27, 2004 By: /s/ David R. Bankhead ------------------------------------- David R. Bankhead Senior Vice President, Chief Financial Officer and Treasurer

EXHIBIT INDEX Exhibit Number Description 99.1 Press Release, dated April 27, 2004.

                                                                    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
                             Second Quarter Results

Highlights -
  o Revenue of $76.5 million and earnings per diluted share of $.21
  o Operating income of $14.1 million; operating margin of 18.4 percent
  o Twelve-month revenue backlog of $233.1 million
  o Cash balance of $137.2 million
  o Eighteen new customers signed during the quarter
  o Fiscal 2004 revenue guidance revised from a range of $271 to $287 million
    to a range of $282 to $292 million
  o Fiscal 2004 EPS guidance revised from a range of $.65 to $.77 to a range of
    $.74 to $.83


(OMAHA, Neb.--April 27, 2004)-- Transaction Systems Architects, Inc. (Nasdaq:
TSAI), a leading global provider of enterprise e-payments and e-commerce
software, achieved strong results for the second quarter of fiscal 2004 ending
March 31, 2004, with revenues of $76.5 million, an increase of 10.5 percent over
the same quarter last year. Net income increased 96.0 percent to $8.0 million,
or $.21 per diluted share, compared to $4.1 million, or $.11 per diluted share,
for the second quarter of fiscal 2003.

For the second quarter of fiscal 2004, revenues were comprised of software
license fees of $42.4 million, maintenance fees of $22.3 million and services
fees of $11.8 million. The Company's recurring revenue was $46.8 million, or 61
percent of revenue, and non-recurring revenue was $29.7 million, or 39 percent
of revenue. Recurring revenue consisted of monthly license fees of $22.2
million, maintenance fees of $22.3 million and facilities management fees of
$2.3 million.

Operating income was $14.1 million, with an operating margin of 18.4 percent,
compared to operating income of $11.3 million in the second quarter of 2003, an
increase of 24.7 percent.

For the six months ended March 31, 2004, revenue totaled $150.5 million,
compared to $131.7 million for the same six-month period in fiscal 2003, an
increase of 14.3 percent. Operating income was $29.6 million for the first six
months of the current year as compared to $18.8 million for the same period last
year, an increase of 57.7 percent. Net income was $18.0 million, compared to
$7.1 million, an increase of 155.0 percent over the first half of fiscal 2003.

During the quarter, the Company added eighteen new customers and brought its
worldwide presence to 76 countries. ACI Worldwide, the Company's largest
business unit, added fourteen new customers during the quarter. Solutions
licensed to these customers included BASE24(R), ACI Payments Manager(TM),
NET24-XPNET(TM), ACI Smart Chip Manager(TM) and ACI Proactive Risk Manager(TM).
ACI Worldwide also licensed capacity upgrades to 17 customers and licensed 12
new applications to existing customers during the quarter, including a
BASE24-es(TM) solution on the HP UX platform.

Insession Technologies, the Company's e-infrastructure business unit, added four
new customers and licensed four new applications to existing customers during
the quarter. Solutions licensed include GoldenGate(TM), AutoDBA(TM), Automated
Operator(TM) and WorkPoint(R).

IntraNet, the Company's international payments and message processing solutions
provider, licensed four new applications and entered into nineteen services
contracts with existing customers during the quarter.

The Company completed the second quarter of fiscal 2004 with $233.1 million in
backlog. Included in backlog are all software license fees, maintenance fees and
services specified in executed contracts to the extent that the Company believes
that recognition of the related revenue will occur within the next twelve
months. Recurring backlog includes all monthly license fees, maintenance fees
and facilities management fees and amounted to $170.8 million. Non-recurring
backlog includes other software license fees and services and amounted to $62.3
million.

"We are pleased with our financial results as market demand for the Company's
products has improved through the first half of fiscal 2004," said Gregory D.
Derkacht, President and CEO. "With the increased market demand across our
geographic channels, we were able to deliver a ten and a half percent increase
in second quarter revenues and a ninety-six percent increase in net income as
compared with the second quarter results for fiscal 2003."

The Company has revised its revenue estimate for fiscal 2004 from a range of
$271 to $287 million to a range of $282 to $292 million. The Company has also
revised its EPS estimate from a range of $.65 to $.77 to a range of $.74 to
$.83.

The Company will provide further details regarding its financial performance for
the second quarter of fiscal 2004 in its scheduled teleconference to be held
Tuesday, April 27, 2004 at 4:00 pm CDT. Interested persons may access a
real-time audio broadcast of the teleconference at: www.tsainc.com/investors.
The web cast will be archived for 10 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 1,715
product systems in 76 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 in
this press release include the Company's recurring and non-recurring backlog,
and each of the Company's revenue estimate and EPS estimate for fiscal 2004. The
Company's actual results could differ materially from the results discussed in
its forward-looking statements. The Company operates in a rapidly changing
technological and economic environment that presents numerous risks. Many of
these risks are beyond the Company's control and are driven by factors that
often cannot be predicted. The following discussion highlights some of these
risks:

o        The Company's backlog estimate is based on management's assessment of
         the customer contracts that exist as of the date the estimate is
         made. A number of factors could result in actual revenues being less
         than the amounts reflected in backlog. The Company's customers may
         attempt to renegotiate or terminate their contracts for a number of
         reasons, including mergers, changes in their financial condition, or
         general changes in economic conditions in their industries or
         geographic locations, or the Company may experience delays in the
         development or delivery 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 a twelve-month period.

o        The Company is currently in the process of evaluating the claims made
         in various lawsuits filed against the Company and certain directors
         and officers relating to its restatement of prior consolidated
         financial results. The Company intends to defend these lawsuits
         vigorously, but cannot predict their outcomes 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 any of
         these lawsuits or if they were not settled on favorable terms, the
         judgment or settlement could have a material adverse effect on its
         financial condition, results of operations and cash flows.

         The Company has insurance that provides an aggregate coverage of $20.0
         million for the period during which the claims 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 liabilities
         relating to these lawsuits, the Company's 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.

         Additional related suits against the Company may be commenced in the
         future. The Company will fully analyze such suits and intends to
         vigorously defend against them. There is a risk that the
         above-described litigation, as well as any additional suits, could
         result in substantial costs and divert management attention and
         resources, which could adversely affect the Company's business,
         financial condition and results of operations.

o        New accounting standards, revised interpretations or guidance regarding
         existing standards, or changes in the Company's business practices
         could result in future changes to the Company's revenue recognition or
         other accounting policies. These changes could have a material adverse
         effect on the Company's business, financial condition and results of
         operations.

o        The Company is subject to income taxes, as well as non-income based
         taxes, in the United States and in various foreign jurisdictions.
         Significant judgment is required in determining the Company's worldwide
         provision for income taxes and other tax liabilities.

         The Company's positions in its amended income tax returns filed for its
         1999 through 2002 tax years are the subject of an ongoing tax
         examination by the Internal Revenue Service ("IRS"). This examination
         may result in the IRS issuing proposed assessments. The Company
         believes that its tax positions comply with applicable tax law and it
         intends to defend its positions through the IRS appeals process.
         However, if the IRS positions on certain issues are upheld after all
         the Company's administrative and legal options are exhausted, a
         material impact on the Company's financial condition and results of
         operations could result.

         The Company's foreign subsidiaries could face challenges from various
         foreign tax authorities and it is not certain that the local
         authorities will accept the Company's tax positions. The Company
         believes its tax positions comply with applicable tax law and it
         intends to defend its positions. Although the Company believes it has
         adequately provided for any probable outcome related to these matters
         and does not anticipate any material earnings impact from their
         ultimate settlement or resolution, differing positions on certain
         issues could be upheld by foreign tax authorities, which could
         adversely affect the Company's financial condition and results of
         operations.

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 software 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.

o        The Company has historically derived a majority of its total revenues
         from international operations and anticipates continuing to do so,
         and is thereby 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        Historically, a majority of the Company's total revenues resulted from
         licensing its BASE24 product line and providing related services and
         maintenance. Any reduction in demand for, or increase in competition
         with respect to, the BASE24 product line could have a material adverse
         effect on the Company's financial condition and results of operations.

o        The Company has historically derived a substantial portion of its
         revenues from licensing of software products that operate on HP
         NonStop servers. Prior to its merger with HP, Compaq Computer
         Corporation announced a plan to consolidate its high-end performance
         enterprise servers on the Intel Corp. Itanium microprocessor, which
         is expected to be completed by 2005. Any reduction in demand for the
         HP NonStop 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. The Company has not determined
         whether consolidation of the high-end servers will materially affect
         the Company's business, financial condition or results of operations.

o        The Company's BASE24-es product is a significant new product for the
         Company. If the Company is unable to generate adequate sales of
         BASE24-es, if market acceptance of BASE24-es is delayed, or if the
         Company is unable to successfully deploy BASE24-es in production
         environments, the Company's business, financial condition and results
         of operations could be materially adversely affected.

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.

o        The Company may acquire new products and services or enhance existing
         products and services through acquisitions of other companies,
         product lines, technologies and personnel, or through investments in
         other companies. Any acquisition or investment may be subject to a
         number of risks, including diversion of management time and
         resources, disruption of the Company's ongoing business, difficulties
         in integrating  acquisitions, dilution to existing stockholders if the
         Company's common stock is issued in consideration for an acquisition
         or investment, the incurring or assuming of indebtedness or other
         liabilities in connection with an acquisition, and lack of
         familiarity with new markets, product lines and competition. The
         failure to manage acquisitions or investments, or successfully
         integrate acquisitions, could have a material adverse effect on the
         Company's business, financial condition and results of operations.

o        To protect its proprietary rights, the Company relies on a
         combination of contractual provisions, including customer licenses
         that restrict use of the Company's products, confidentiality
         agreements and procedures, and trade secret and copyright laws.
         Despite such efforts, the Company may not be able to adequately
         protect its proprietary rights, and the Company's competitors may
         independently develop similar technology, duplicate products or
         design around any rights the Company believes to be proprietary.
         This may be particularly true in countries other than the United
         States because some foreign laws do not protect proprietary rights to
         the same extent as certain laws of the United  States. Any failure or
         inability of the Company to protect its proprietary rights could
         materially adversely affect the Company.

o        There has been a substantial amount of litigation in the software
         industry regarding intellectual property rights. The Company
         anticipates that software product developers and providers of
         electronic commerce solutions could increasingly be subject to
         infringement claims, and third parties may claim that the Company's
         present and future  products  infringe  their intellectual property
         rights. Any claims, with or without merit, could be time-consuming,
         result in costly litigation, cause product delivery delays or require
         the Company to enter into royalty or licensing agreements. Royalty
         or licensing agreements, if required, may not be available on terms
         acceptable to the Company or at all, which could adversely affect the
         Company's business. A successful claim by a third party of
         intellectual property infringement by the Company could compel the
         Company to enter into costly royalty or license agreements, or
         require the Company to pay significant damages or even require the
         Company to stop selling certain products.

o        The Company's software products are complex. They may contain
         undetected errors or failures when first introduced or as new
         versions are released. This may result in loss of, or delay in,
         market acceptance of the Company's products and a corresponding loss
         of sales or  revenues. Customers depend upon the Company's products
         for mission-critical applications. Software product errors or
         failures could subject the Company to product liability, as well as
         performance and warranty claims, which could materially adversely
         affect the Company's business, financial condition and results of
         operations.


                           FINANCIAL HIGHLIGHTS FOLLOW


TRANSACTION SYSTEMS ARCHITECTS, INC. CONSOLIDATED BALANCE SHEETS (in thousands) March 31, September 30, 2004 2003 ------------ ------------- (Unaudited) ASSETS Current assets: Cash and cash equivalents $ 137,218 $ 113,986 Marketable securities - 1,296 Billed receivables, net 51,928 42,225 Accrued receivables 13,476 9,592 Recoverable income taxes 11,202 11,985 Deferred income taxes, net 5,667 10,316 Other 5,923 5,104 --------- --------- Total current assets 225,414 194,504 Property and equipment, net 8,425 9,405 Software, net 1,547 2,319 Goodwill, net 46,689 46,425 Deferred income taxes, net 9,497 9,638 Other 1,126 1,609 --------- --------- Total assets $ 292,698 $ 263,900 ========= ========= LIABILITIES AND STOCKHOLDERS' EQUITY Current liabilities: Current portion of debt - financing agreements $ 10,577 $ 15,493 Accounts payable 5,782 6,965 Accrued employee compensation 10,648 9,822 Accrued liabilities 11,421 9,714 Deferred revenue 83,017 70,798 Other 292 628 --------- --------- Total current liabilities 121,737 113,420 Debt - financing agreements 4,627 9,444 Deferred revenue 14,243 17,689 Other 753 473 --------- --------- Total liabilities 141,360 141,026 --------- --------- Stockholders' equity: Class A Common Stock 193 188 Treasury stock, at cost (35,258) (35,258) Additional paid-in capital 247,748 235,767 Accumulated deficit (51,585) (69,602) Accumulated other comprehensive loss, net (9,760) (8,221) --------- --------- Total stockholders' equity 151,338 122,874 --------- --------- Total liabilities and stockholders' equity $ 292,698 $ 263,900 ========= =========

TRANSACTION SYSTEMS ARCHITECTS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited and in thousands, except per share amounts) Three Months Ended Six Months Ended March 31, March 31, ------------------------- ------------------------- 2004 2003 2004 2003 --------- --------- --------- --------- Revenues: Software license fees $ 42,380 $ 38,167 $ 83,613 $ 69,497 Maintenance fees 22,370 19,461 43,683 38,065 Services 11,777 11,622 23,248 24,177 --------- --------- --------- --------- Total revenues 76,527 69,250 150,544 131,739 --------- --------- --------- --------- Expenses: Cost of software license fees 6,189 6,289 12,828 12,228 Cost of maintenance and services 14,739 15,693 29,718 30,501 Research and development 9,572 8,357 19,005 16,307 Selling and marketing 16,127 13,529 29,917 27,265 General and administrative 15,834 14,104 29,502 26,687 --------- --------- --------- --------- Total expenses 62,461 57,972 120,970 112,988 --------- --------- --------- --------- Operating income 14,066 11,278 29,574 18,751 --------- --------- --------- --------- Other income (expense): Interest income 349 285 872 595 Interest expense (381) (787) (912) (1,743) Other, net (131) 79 2,074 (1,060) --------- --------- --------- --------- Total other income (expense) (163) (423) 2,034 (2,208) --------- --------- --------- --------- Income before income taxes 13,903 10,855 31,608 16,543 Income tax provision (5,927) (6,785) (13,591) (9,478) --------- --------- --------- --------- Net income $ 7,976 $ 4,070 $ 18,017 $ 7,065 ========= ========= ========= ========= Earnings per share information: Weighted average shares outstanding: Basic 36,846 35,486 36,613 35,462 ========= ========= ========= ========= Diluted 38,027 35,573 37,835 35,562 ========= ========= ========= ========= Earnings per share: Basic $ 0.22 $ 0.11 $ 0.49 $ 0.20 ========= ========= ========= ========= Diluted $ 0.21 $ 0.11 $ 0.48 $ 0.20 ========= ========= ========= =========