Document:

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                                                                    EXHIBIT 10.4

                            ASSIGNMENT OF TRADEMARKS

         Whereas, The Dun & Bradstreet Corporation, a Delaware corporation,
having its principal offices at One Diamond Hill Road, Murray Hill, New Jersey
07974 (Assignor), has adopted, used and/or is using and is the owner of
trademarks in the United States including, but not limited to, those
registrations and applications on Schedule A and common law trademarks on
Schedule B attached hereto;
         Whereas, The New D & B Corporation (Assignee), a Delaware corporation,
having its principal place of business at One Diamond Hill Road, Murray Hill,
New Jersey 07974, is desirous of acquiring the rights to said trademarks;
         Now, therefore, for good and valuable consideration, the receipt of
which is hereby acknowledged, Assignor hereby assigns to Assignee, and its
successors in interest, all right, title and interest in and to said trademarks,
together with the goodwill of the business symbolized by said trademarks and the
applications and registrations on Schedule A and B attached hereto, including
all common-law and other rights in said trademarks, all claims, demands and
causes for action, both at law and in equity, that Assignor may have, or may
hereinafter acquire, on account of any infringement of said trademarks and the
applications and registrations thereof prior to the date hereof, and does hereby
empower Assignee, and its successors in interest, to sue for and collect the
same, to its and their own and absolute use.
         IN WITNESS WHEREOF, the undersigned, being duly authorized and acting
on behalf of Assignor, does hereby execute this assignment to take effect on the
1st day of September, 2000.

                                  The Dun & Bradstreet Corporation

                                  By:  /s/ David J. Lewinter
                                  Title:  Vice President and Corporate Secretary
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                            ASSIGNMENT OF COPYRIGHTS

         Whereas, The Dun & Bradstreet Corporation, a Delaware corporation,
having its principal offices at One Diamond Hill Road, Murray Hill, New Jersey
07974 (Assignor), is the owner of any copyrights developed during the course of
its business and relating thereto;
         Whereas, The New D & B Corporation (Assignee), a Delaware corporation,
having its principal place of business at One Diamond Hill Road, Murray Hill,
New Jersey 07974, is desirous of acquiring the rights of The Dun & Bradstreet
Corporation to said copyrights;
         Now, therefore, for good and valuable consideration, the receipt of
which is hereby acknowledged, Assignor hereby assigns to Assignee, and its
successors in interest, all right, title and interest in and to said copyrights
of The Dun & Bradstreet Corporation and any registrations thereof, and including
all common-law and other rights in said copyrights, all claims, demands and
causes for action, both at law and in equity, that Assignor may have, or may
hereinafter acquire, on account of any infringement of said copyrights and any
registrations thereof prior to the date hereof, and does hereby empower
Assignee, and its successors in interest, to sue for and collect the same, to
its and their own and absolute use.
         IN WITNESS WHEREOF, the undersigned, being duly authorized and acting
on behalf of Assignor, does hereby execute this assignment to take effect on the
1st day of September, 2000.

                                  The Dun & Bradstreet Corporation

                                  By: /s/ David J. Lewinter
                                  Title: President and Secretary

                                       2<PAGE>   1
                                                                    EXHIBIT 10.5

                      SHARED TRANSACTION SERVICES AGREEMENT
                                     BETWEEN
                        THE DUN & BRADSTREET CORPORATION
                                       AND
                             THE NEW D&B CORPORATION

                         Dated as of September 30, 2000
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                  SHARED TRANSACTION SERVICES AGREEMENT (this "Agreement"),
dated as of September 30, 2000 (the "Agreement Date"), by and between The New
D&B Corporation, a Delaware corporation ("New D&B") and The Dun & Bradstreet
Corporation, a Delaware corporation (the "Corporation").

                              W I T N E S S E T H :

                  WHEREAS, the Board of Directors of the Corporation has
determined that it is appropriate, desirable, and in the best interests of the
Corporation and its businesses, as well as the holders of shares of common
stock, par value $0.01 per share, of the Corporation ("Corporation Common
Stock"), to take certain steps to reorganize Corporation's subsidiaries and
businesses and then to distribute to the holders of the Corporation Common Stock
all the outstanding shares of common stock of New D&B (the "Distribution");

                  WHEREAS, prior to the Distribution Date, Dun & Bradstreet,
Inc. ("Service Provider"), a subsidiary of New D&B, has provided, and Moody's
Investors Service, Inc. ("Moody's"), a subsidiary of the Corporation, has
purchased, pursuant to various written and oral agreements, the Services
described in this Agreement; and

                  WHEREAS, in order to facilitate the orderly continuation of
Moody's business for a transitional period after the Distribution Date and to
provide certain services to Moody's and the Corporation after the Distribution
Date, New D&B, on behalf of Service Provider, has agreed to provide to Moody's
and the Corporation (collectively, Moody's and the Corporation are referred to
herein as the "Recipient"), and the Corporation, on behalf of itself and
Moody's, has agreed to purchase from Service Provider, the Services described in
this Agreement.

                  NOW, THEREFORE, in consideration of the agreements set forth
below, it is agreed as follows:

ARTICLE 1.  DEFINITIONS AND CONSTRUCTION

                  1.1 Definitions. The following defined terms shall have the
meanings specified below:

(1)      "Additional Services" shall mean those services, in addition to the
         Services, requested by Recipient pursuant to Section 3.2.

(2)      "Agreement" shall have the meaning set forth in the Heading.

(3)      "Agreement Date" shall have the meaning set forth in the preamble.

(4)      "Alternative Provider" shall mean any alternative external service
         provider selected by Recipient for the provision of services similar to
         the Services following the expiration or termination of this Agreement.

(5)      "Corporation" shall have the meaning set forth in the preamble.

(6)      "Distribution" shall have the meaning set forth in the Recitals.
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                                                                               2

(7)      "Distribution Agreement" shall mean the Distribution Agreement dated as
         of September 30, 2000, between the Corporation and New D&B.

(8)      "Distribution Date" shall mean the date on which the Distribution is
         made under the Distribution Agreement.

(9)      "Fees" shall mean those charges for the Services set forth in Schedule
         C.

(10)     "Moody's" shall have the meaning set forth in the Recitals.

(11)     "New D&B" shall have the meaning set forth in the preamble.

(12)     "Parties" shall mean Service Provider and Recipient, collectively.

(13)     "Party" shall mean either of Service Provider or Recipient, as the case
         may be.

(14)     "Recipient" shall have the meaning set forth in the Recitals.

(15)     "Recipient Data" shall mean all data or information supplied by
         Recipient to Service Provider for processing or transmission in
         connection with the Services.

(16)     "Service Provider" shall have the meaning set forth in the Recitals.

(17)     "Service Provider Service Location" shall mean any location from which
         Service Provider provides or performs the Services.

(18)     "Service" shall mean the Shared Transaction Services.

(19)     "Shared Transaction Services" shall mean the services described in
         Schedule A.

(20)     "Term" shall have the meaning set forth in Article 2.

                  1.2 References. In this Agreement and the Schedules to this
Agreement:

         (1)      the Schedules to this Agreement shall be incorporated in and
                  deemed part of this Agreement and all references to this
                  Agreement shall include the Schedules to this Agreement; and

         (2)      references to the word "including" or the phrase "e.g." in
                  this Agreement shall mean "including, without limitation".

                  1.3 Headings. The article and section headings are for
reference and convenience only and shall not be considered in the interpretation
of this Agreement.
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                                                                               3

                  1.4 Interpretation of Documents. In the event of a conflict
between this Agreement and the terms of any of the Schedules, the terms of this
Agreement shall prevail.

ARTICLE 2.  TERM OF AGREEMENT.

                  The term of this Agreement shall commence on the Distribution
Date and shall continue until the earlier of the date on which all services to
be provided hereunder have been completed (the "Term") and, with respect to any
particular service, the termination date applicable to such service as set forth
in Schedule A, in each case unless terminated earlier pursuant to Article 13.

ARTICLE 3.  SERVICES.

                  3.1 Services. Service Provider shall provide to Recipient, and
Recipient shall purchase from Service Provider, the Shared Transaction Services.
The Services shall be of substantially the same type, quantity, quality and
utilization levels and provided with substantially the same degree of care and
diligence as such services had been provided to Recipient during the period
prior to the Distribution Date.

                  3.2 Additional Services. In the event that Recipient desires
to receive Additional Services or requires an increase in volume of Services,
Recipient shall notify Service Provider. Service Provider shall provide
Additional Services or a requested increase in volume of Services, if Service
Provider and Recipient agree to the terms and conditions, including the fees,
for such additional services or increased volume of Services. Service Provider
and Recipient shall execute a written amendment to this Agreement setting forth
any additional terms and conditions applicable thereto, including any additional
fees.

ARTICLE 4.  RECIPIENT OBLIGATIONS.

                  4.1 Generally. Recipient shall:

(1)      comply with any reasonable instructions provided by Service Provider
         that are necessary for Service Provider to adequately provide the
         Services;

(2)      comply with all standards and procedures applicable to the Service
         Provider Service Location;

(3)      promptly report any operational or system problem to Service Provider;
         and

(4)      maintain a business recovery plan detailing the requirements of
         Recipient in the event of the occurrence of a disaster affecting the
         Services and periodically test such plan.

                  4.2 Associated Equipment. Recipient shall maintain and be
responsible for all costs (including personnel, maintenance and repair)
associated with communications equipment (including terminals, communications
hardware, modems and telephone lines) that Recipient owns or operates
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                                                                               4

and that are not located at the Service Provider Service Location necessary to
provide the Services or to transmit the Recipient Data for processing at the
Service Provider Service Location.

                  4.3 Security. Recipient shall ensure that user accounts shall
only be used by the person for whom such account was created or other authorized
personnel. Recipient shall promptly inform Service Provider of any individual
who is no longer authorized to use the Services.

ARTICLE 5.  PROPRIETARY RIGHTS.

                  5.1 Exclusive Property. All software and hardware used by
Service Provider to provide the Services is, or shall be, and shall remain, the
exclusive property of Service Provider or its third party licensor and Recipient
shall have no rights or interests in same.

                  5.2 Third-Party Licenses. With regard to any software set
forth on Schedule B used by Service Provider to provide the Services, in the
event that any licensor of such software to Service Provider does not permit
Service Provider to use such software or any portion thereof to provide the
Services, Recipient shall obtain a license for such software at its own cost
(which permits Service Provider to use such software to provide the Services)
and Service Provider shall reduce the Fees to reflect such reduction in its
costs, or in the event that Service Provider itself obtains the right to the
software set forth on Schedule B to provide the services, Service Provider shall
have the right to increase the Fees to reflect fifty percent (50%) of the
increase in its costs, and Service Provider shall not be responsible for the
loss of the right to use such software to provide the Services or for any
failure or delay of Recipient in procuring such license provided that Service
Provider gives notice to Recipient and reasonably assists Recipient in procuring
such license.

ARTICLE 6.  DATA

                  6.1 Form of Data. All data submitted by Recipient to Service
Provider in connection with the Services shall be in the form substantially
similar to that submitted before the Distribution date, unless otherwise agreed
to in writing by the parties.

                  6.2  Ownership of Data.  The Recipient Data is and shall
remain the property of Recipient or its customers.

                  6.3 Ownership of Media. Unless furnished to Service Provider
by Recipient, all media upon which Recipient Data is stored is and shall remain
the property of Service Provider. Recipient may, upon Service Provider's
consent, (1) provide Service Provider with a replacement for the media upon
which the Recipient Data is stored or (2) purchase such media from Service
Provider at the price specified by Service Provider.

                  6.4 Responsibility for Data. Recipient is responsible from the
Agreement Date for (1) the accuracy and completeness of the data submitted by
Recipient in connection with the Services and (2) any errors in and with respect
to data obtained from Service Provider because of any inaccurate or incomplete
data submitted by Recipient to Service Provider.
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                                                                               5

ARTICLE 7.  FEES

                  7.1 Fees. Recipient shall pay to Service Provider the fees set
forth in Schedule C in respect of each of the Services.

                  7.2 Time of Payment. The Fees shall be paid by Recipient as
set forth on Schedule C.

                  7.3 Taxes. Recipient shall pay any value-added tax and any
tariff, duty, export or import fee, sales tax, use tax, service tax or other tax
or charge subsequently imposed by any government or government agency on
Recipient or Service Provider with respect to the Services or the execution or
performance of this Agreement.

                  7.4 Late Payments. Any fees or payments owing to Service
Provider pursuant to this Agreement that are not paid when due (other than as a
result of a delay directly caused by Service Provider or its affiliates) shall
bear interest at the rate of one and one-half (11/2) percent per month, but in
no event to exceed the highest lawful rate of interest, calculated from the date
such amount was due until the date payment is received by Service Provider.

ARTICLE 8.  CONFIDENTIALITY.

                  Each of the Parties shall not use or permit the use of
(without the prior consent of the other) and shall keep, and shall cause its
consultants and advisors to keep, confidential all information concerning the
other Party in its possession, its custody or under its control, except to the
extent that (1) such information has been in the public domain through no fault
of such Party or (2) such information has been later lawfully acquired from
other sources by such Party or (3) this Agreement or any other agreement entered
into pursuant to this Agreement permits the use or disclosure of such
information, to the extent such information (a) relates to the period up to the
Distribution Date or (b) is obtained in the course of providing or receiving the
Services pursuant to this Agreement, and each Party shall not (without the prior
consent of the other) otherwise release or disclose such information to any
other person, except such Party's auditors and attorneys, unless compelled to
disclose such information by judicial or administrative process or unless such
disclosure is required by law and such Party has used commercially reasonable
efforts to consult with the other Party prior to such disclosure.

ARTICLE 9.  DISCLAIMER AND LIMITATION OF LIABILITY.

                  9.1 DISCLAIMER. EXCEPT AS EXPRESSLY SET FORTH HEREIN, SERVICE
PROVIDER MAKES NO REPRESENTATIONS OR WARRANTIES IN RESPECT OF THE SERVICES,
EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE.

                  9.2 Limitation of Liability. Recipient acknowledges that the
Services are provided by Service Provider (1) at the request of Recipient in
order to accommodate the Distribution, (2) at Service Provider's cost and that
no profit is being made by Service Provider and (3) with the
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                                                                               6

expectation that Service Provider is not assuming any financial or operational
risks, including those usually assumed by a service provider. Except as may
arise as a result of a the gross negligence or willful misconduct of Service
Provider, Recipient agrees that Service Provider shall not be liable for any
direct, indirect, special, incidental, consequential or other damages, of any
nature whatsoever, including lost profits or savings, whether or not such
damages are foreseeable, or for any third party claims relating to the Services
or Service Provider's performance under this Agreement.

ARTICLE 10.  DISPUTE RESOLUTION.

                  10.1 Procedure. Any disputes arising out of or in connection
with this Agreement shall be settled in accordance with the dispute resolution
mechanisms set forth in Article VI and Section 8.17 of the Distribution
Agreement.

                  10.2 Continuity of Services and Performance. Unless otherwise
agreed in writing, the Parties shall continue to provide the Services and honor
all other commitments under this Agreement during the course of dispute
resolution pursuant to the provisions of this Article 11 with respect to all
matters not subject to such dispute, controversy or claim.

ARTICLE 11.  CONTINUED PROVISION OF SERVICES.

                  11.1 Force Majeure. Service Provider shall not be in default
of its obligations hereunder for any delays or failure in performance resulting
from any cause or circumstance beyond the reasonable control of Service
Provider, provided that Service Provider exercises commercially reasonable
efforts to perform its obligations in a timely manner. If any such occurrence
prevents Service Provider from providing any of the Services, Service Provider
shall cooperate with Recipient in obtaining, at Recipient's sole expense, an
alternative source for the affected Services, and Recipient shall be released
from any payment obligation to Service Provider in respect of such Services
during the period of such force majeure.

                  11.2 Disaster Recovery. Service Provider shall maintain a
disaster recovery policy in accordance with Schedule A. Upon the occurrence of a
disaster affecting the Services, Service Provider shall implement the disaster
recovery policy and Recipient shall be responsible for its proportionate share
of any fees incurred by Service Provider in connection with implementing the
disaster recovery policy.

ARTICLE 12.  TERMINATION.

                  12.1 For Convenience. Recipient may terminate this Agreement
at any time during the Term upon one hundred eighty (180) days' notice to
Service Provider without any obligation to pay the Fees after such one hundred
eighty (180) day period. In the event that Recipient terminates this Agreement
upon less than one hundred eighty (180) day's notice, Recipient shall be
required to pay the Fees until the expiration of such one hundred and eighty
(180) day period.

                  12.2  Other. (a) Service Provider may terminate this Agreement
as set forth in Section 14.16 hereof.
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                                                                               7

ARTICLE 13.  TERMINATION ASSISTANCE SERVICES.

                  Upon the expiration of this Agreement or the effective date of
termination of this Agreement, Service Provider shall have no further obligation
to provide the Services to Recipient and for a period up to (a) sixty (60) days
prior to the expiration or the effective date of termination of this Agreement
and (b) thirty (30) days following the expiration of this Agreement or the
effective date of termination of this Agreement, Service Provider shall use
reasonable efforts to cooperate, at Recipient's expense (which shall not be
greater than Service Provider's costs related thereto), with (i) the Alternative
Provider or (ii) Recipient, in connection with the transfer of the Services and
the Recipient Data, from Service Provider to the facilities of (x) the
Alternative Provider or (y) Recipient, as requested by Recipient.

ARTICLE 14.  MISCELLANEOUS PROVISIONS.

                  14.1 No Waivers. No failure on the part of either Party to
exercise and no delay in exercising any right or remedy hereunder shall operate
as a waiver thereof nor shall any single or partial exercise by a Party of any
right or remedy hereunder preclude any other right or remedy or further exercise
thereof or the exercise of any other right.

                  14.2 Consents, Approvals and Requests. Unless otherwise
specified in this Agreement, all consents and approvals, acceptances or similar
actions to be given by either Party under this Agreement shall not be
unreasonably withheld or delayed and each Party shall make only reasonable
requests under this Agreement.

                  14.3 Partial Invalidity. In the event any of the provisions of
this Agreement shall be invalid, illegal or unenforceable in any respect, the
validity, legality or enforceability of the remaining provisions of this
Agreement shall not be affected or impaired.

                  14.4 Notices. All notices, designations, approvals, consents,
requests, acceptances, rejections or other communications required or permitted
by this Agreement shall be in writing and shall be sent via telecopy to the
telecopy number specified below. A copy of any such notice shall also be sent by
registered express air mail on the date such notice is transmitted by telecopy
to the address specified below:

                  If to Service Provider:

                                    The Dun & Bradstreet Corporation
                                    One Diamond Hill Road
                                    Murray Hill, New Jersey 07974
                                    Telecopy No.:  (908) 665-5827
                                    Attention:  Chief Legal Counsel

                  If to Recipient:

                                    Moody's Investors Service, Inc.
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                                                                               8

                                    99 Church Street
                                    New York, NY 10007
                                    Telecopy No.:  (212) 553-0084
                                    Attention:  Chief Legal Counsel

Any Party may at any time, by notice to the other Party transmitted or sent in
the manner described above, change the address or telecopy number to which
communications to it are to be sent.

                  14.5 Relationship. The performance by Service Provider of its
duties and obligations under this Agreement shall be that of an independent
contractor and nothing herein contained shall create or imply an agency
relationship between the Parties, nor shall this Agreement be deemed to
constitute a joint venture or partnership between the Parties.

                  14.6 GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK APPLICABLE TO
CONTRACTS MADE AND TO BE PERFORMED IN THE STATE OF NEW YORK.

                  14.7 Covenant of Further Assurances. The Parties covenant and
agree that, subsequent to the execution and delivery of this Agreement and
without any additional consideration, each of the Parties will execute and
deliver any further legal instruments and perform any acts which are or may
become reasonably necessary to effectuate this Agreement.

                  14.8 Assignment. This Agreement may not be assigned by either
Party, other than to an affiliate of such Party or pursuant to a corporate
reorganization or merger, without the consent of the other Party. Any assignment
in contravention of this Section 15.8 shall be void.

                  14.9 Entire Understanding. This Agreement represents the
entire understanding of the Parties with respect to the Services and supersedes
all previous writings, correspondence and memoranda with respect thereto, and no
representations, warranties, agreements or covenants, express or implied, of any
kind or character whatsoever with respect to such subject matter have been made
by either Party to the other, except as herein expressly set forth.

                  14.10 Successors. Subject to the restrictions on assignment
set forth in Section 15.8, this Agreement shall be binding upon and inure to the
benefit of and be enforceable against the Parties hereto and their respective
successors and assigns.

                  14.11  Amendments.  This Agreement can be modified or amended
only by a written amendment executed by both Parties.

                  14.12 Survival. The provisions of Article 5, Article 8,
Article 9, Article 10, Article 11, Article 14, Section 6.2, Section 6.3, Section
7.2, Section 13.2, Section 15.6, this Section 15.12 and Section 15.14 shall
survive the expiration or termination of this Agreement.
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                                                                               9

                  14.13 Counterparts. This Agreement may be executed in
counterparts, each of which shall be deemed an original, but all of which shall
constitute one and the same instrument.

                  14.14 Good Faith and Fair Dealing. Each Party hereby agrees
that its performance of all obligations and exercise of all rights under this
Agreement shall be governed by the fundamental principles of good faith and fair
dealing.

                  14.15 Third Party Beneficiaries. Each Party intends that this
Agreement shall not benefit or create any right or cause of action in or on
behalf of any person or entity other than Recipient and Service Provider.

                  14.16 Subcontractors and Outsourcing. Except as set forth
herein, Service Provider shall have the right to subcontract or outsource any of
its obligations hereunder, provided that the Corporation consents to such
subcontracting or outsourcing, which consent shall not be unreasonably withheld.
The Corporation shall respond to any such request by Service Provider within
thirty (30) days of receipt of such request. In the event that the Corporation
does not consent to such request, then the Service Provider shall have the right
to terminate this Agreement upon one hundred fifty (150) days written notice
without any obligation to pay the Fees after such one hundred fifty (150) day
period; provided that in no event shall such termination be effective prior to
June 30, 2001. Failure by the Corporation to respond to such request within the
time period set forth above shall be deemed to indicate the Corporation's
consent to such request.
<PAGE>   11
                  IN WITNESS WHEREOF, the Parties hereto have caused this
Agreement to be executed by their duly authorized officers as of the day and
year first above written.

                                       THE NEW D&B CORPORATION

                                       By: /s/ David J. Lewinter
                                           Name: David J. Lewinter
                                           Title: President and Secretary

                                       THE DUN & BRADSTREET CORPORATION

                                       By: /s/ David J. Lewinter
                                           Name: David J. Lewinter
                                           Title: Vice President and Corporate
                                                  Secretary

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