Document:

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                                                                   Exhibit 10.11

                            NON-COMPETITION AGREEMENT
                  (hereinafter referred to as the "Agreement")

         This Agreement, entered into this 18th day of February, 2003, by and
between American Financial Group, Inc., an Ohio corporation ("AFG") and Infinity
Property and Casualty Corporation, an Ohio corporation ("Company").

                                   WITNESSETH

         WHEREAS, AFG, through its wholly-owned subsidiary, American Premier
Underwriters, Inc. ("APU") has sponsored the formation of Company;

         WHEREAS, Company has filed a registration statement under the
Securities Act for the purpose of selling a portion of the common shares owned
by APU;

         WHEREAS, Company wishes to secure AFG's agreement not to compete with
Company and its Subsidiaries in order to enable Company and its Subsidiaries to
successfully conduct personal automobile insurance business written through
independent agents.

         NOW, THEREFORE, in consideration of the premises and of the mutual
covenants and obligations contained herein, the parties hereto agree as follows:

         1. Definitions. Terms used herein without definition shall have the
meaning set forth in the Formation and Separation Agreement.

         2. Non-Competition.

                  (a) Except as set forth in this Agreement for a period of five
         years following the Closing Date (the "Restricted Period") AFG shall
         not, and shall not permit any of its Post-Closing Subsidiaries.

                           (i) offer, issue or sell, directly or indirectly
                  within the United States, personal automobile insurance
                  written through independent agents; or

                           (ii) employ, offer to employ or solicit with a view
                  to employment any person employed by the Company whose annual
                  base salary exceeds $50,000; provided, that the foregoing will
                  not prevent AFG from soliciting or hiring any such person if
                  such person's employment has been terminated, without cause,
                  by the Company.

                  (b) Notwithstanding any other provision of this Section 2 to
         the contrary, neither AFG nor any of its Post-Closing Subsidiaries is
         prohibited from:

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                           (i) engaging in any line of business in which it is
                  engaged at completion of the Public Offering, including,
                  without limitation, the offering of personal automobile
                  insurance policies through Mid-Continent Casualty Company and
                  its wholly-owned subsidiaries ("Mid-Continent"), but only
                  within those states where Mid-Continent is offering personal
                  automobile insurance policies at the time of the completion of
                  the Public Offering; or

                           (ii) acquiring an interest in any Person engaged in
                  any line of business except for acquisitions of controlling
                  interests, whether in a single transaction or series of
                  transactions, in any Person or Persons with, in the aggregate,
                  $100,000,000 or more in gross annual written premiums, or,
                  with respect to one Person, 50% or more of its gross revenues
                  (excluding investment income and realized investment gains and
                  losses), attributable to the writing of personal automobile
                  insurance based on the most recent full fiscal year for which
                  financial statements are available (a "PERMITTED ACQUIREE"),
                  provided further, however, that AFG and any of its
                  Post-Closing Subsidiaries may acquire a controlling interest
                  in a Person that is not a Permitted Acquiree if AFG or such
                  Post-Closing Subsidiary promptly divests the personal
                  automobile insurance operations of such Person. For purposes
                  of this Agreement, a "controlling interest" in a Person means
                  having the power to direct or cause the direction of
                  management and policies of such Person through the ownership
                  of voting securities.

                  (c) Section 2(a)(i) and (ii) shall also be binding upon any
         person who has a controlling interest in AFG as of the Closing Date
         until such time, however, that the person ceases to have a controlling
         interest in AFG. AFG shall cause each such person to comply with the
         terms and conditions hereof.

                  (d) Section 2(a)(i) and (ii) shall not be binding upon a
         Post-Closing Subsidiary of AFG after the time such Person ceases to be
         a Post-Closing Subsidiary of AFG. For avoidance of doubt, Section
         2(a)(i) and (ii) also does not apply to any person which on or after
         the Closing Date becomes an Affiliate (other than a Post-Closing
         Subsidiary) of AFG, including any person that acquires all or
         substantially all of the capital stock or assets of AFG.

                  (e) The Company and AFG agree that money damages alone would
         not be a sufficient remedy for any breach of this Section 2 by AFG, its
         Post-Closing Subsidiaries, or any person having a controlling interest
         in AFG, and that, in addition to all other remedies, including monetary
         relief, the Company shall be entitled to specific performance and
         injunctive or other equitable relief as a remedy for any such breach.

         3. No Inconsistent Actions. The parties hereto shall not voluntarily
undertake or fail to undertake any action or course of action inconsistent with,
or to avoid

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or evade, the provisions or essential intent of this Agreement. Furthermore, it
is the intent of the parties hereto to act in a fair and reasonable manner with
respect to the interpretation and application of the provisions of this
Agreement.

         4. Severability. If any term or other provision of this Agreement is
invalid, illegal or incapable of being enforced by any law, rule or regulation
or public policy, all other terms and provisions of this Agreement shall
nevertheless remain in full force and effect so long as the economic or legal
substance of the transactions contemplated hereby is not affected in any manner
materially adverse to any party. Upon such determination that any term or other
provision is invalid, illegal or incapable of being enforced, the parties hereto
shall negotiate in good faith to modify this Agreement so as to effect the
original intent of the parties as closely as possible in an acceptable manner in
order that the transactions contemplated hereby are consummated as originally
contemplated to the greatest extent possible.

         IN WITNESS WHEREOF, the parties have caused this Agreement to be duly
executed as of the day and year first above written.

                      AMERICAN FINANCIAL GROUP, INC.

                      By:    /s/ James C. Kennedy
                         ----------------------------------------------------
                      Name: James C. Kennedy
                      Title: Vice President, Deputy General Counsel and
                             Secretary

                      INFINITY PROPERTY AND CASUALTY
                      CORPORATION

                      By:    /s/  Samuel J. Simon
                         ----------------------------------------------------
                      Name: Samuel J. Simon
                      Title: Senior Vice President, General Counsel and

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                                                                   Exhibit 10.12

                  TAX ALLOCATION AND INDEMNIFICATION AGREEMENT

         This Agreement is made this 18th day of February, 2003 by and between
American Financial Corporation, an Ohio corporation (hereinafter called "AFC"),
and each and every one of those companies set forth on the signature page hereof
(collectively referred to as the "NSA Group Subsidiaries");

                                   WITNESSETH:

         WHEREAS, as a result of AFC's direct or indirect ownership of at least
80% of the voting power of all classes of outstanding stock of each of the NSA
Group Subsidiaries, AFC and the NSA Group Subsidiaries have comprised an
affiliated group (hereinafter "Affiliated Group"), as that term is defined under
Section 1504 of the Internal Revenue Code of 1954, as amended; and

         WHEREAS, each of the NSA Group Subsidiaries has satisfied its federal
income tax obligations by payments to (or receiving benefits from) AFC pursuant
to an Agreement of Allocation of Payment of Federal Income Taxes dated May 13,
1974, (the "Tax Allocation Agreement") and;

         WHEREAS, the Tax Allocation Agreement specifies that such federal
income tax obligations be computed with respect to GAAP income.

         WHEREAS, the NSA Group Subsidiaries' parent company, Infinity Property
and Casualty Corporation, has filed a registration statement under the
Securities Act for the purpose of selling a portion of its common stock
indirectly owned by AFC; and

         WHEREAS, upon completion of the public offering, the NSA Group
Subsidiaries will no longer be members of the Affiliated Group; and

         WHEREAS, AFC and the NSA Group Subsidiaries wish to provide for each of
their respective responsibilities and indemnification obligations with respect
to the payment of federal income taxes for taxable periods ending on or before
the completion of the public offering (the "Closing Date").

         NOW, THEREFORE, in consideration of the mutual promises and covenants
contained herein, AFC and the NSA Group Subsidiaries do hereby agree as follows:

         (1) Each member's allocable federal income tax will be determined by
reference to, and consistent with the methodology employed under, the Tax
Allocation Agreement.

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         (2) AFC shall be responsible for, shall pay all taxes to be paid, and
shall indemnify the NSA Group Subsidiaries against any and all pre-closing
federal income taxes imposed on the Affiliated Group that would have been
allocated to members of the Affiliated Group, other than the NSA Group
Subsidiaries, for taxable periods or portions thereof ending on or before the
Closing Date. In the case of federal income taxes attributable to taxable
periods beginning on or before and ending after the Closing Date ("Straddle") if
any, the taxes for the pre-closing period shall be computed as if such taxable
period ended on the date of the Closing.

         (3) The NSA Group Subsidiaries shall be responsible for, shall pay all
taxes to be paid, and shall indemnify AFC against any and all pre-closing
federal income taxes imposed on the Affiliated Group that would have been
allocated to the NSA Group Subsidiaries for taxable periods or portions thereof
ending on or before the Closing Date. AFC shall include the income of the NSA
Group Subsidiaries for the pre-closing period in the Affiliated Group's federal
consolidated tax returns, and shall file and be responsible for remitting all
taxes reflected on such consolidated returns. AFC shall prepare and file all
federal tax returns required to be filed by or with respect to the Affiliated
Group for periods ending on or before or including the Closing Date and shall
pay all federal income taxes due with respect thereto.

         (4) Any refunds of federal income taxes with respect to taxes allocated
to the NSA Group Subsidiaries and paid for any period ending on or before the
Closing Date shall be for the account of the NSA Group Subsidiaries. AFC shall,
if the NSA Group Subsidiaries so requests and at the NSA Group Subsidiaries'
expense, cause the relevant entity to file for and obtain any refunds to which
the NSA Group Subsidiaries are entitled hereunder, including through the
prosecution of an administrative or federal proceeding which the NSA Group
Subsidiaries, at their discretion, choose to direct such entity to pursue. AFC
shall permit the NSA Group Subsidiaries to participate in, but not control (at
the NSA Group Subsidiaries' expense), the prosecution of any such refund claimed
and when deemed appropriate by AFC, shall cause a relevant entity to authorize
by appropriate power of attorney such persons as the NSA Group Subsidiaries
shall designate to represent such entity with respect to such refund claim.
Without imposing any duty of investigation upon AFC, AFC shall, and shall cause
its affiliated members, to notify the NSA Group Subsidiaries of the existence of
any facts known to the Affiliated Group that would constitute a reasonable basis
for claiming a refund of taxes to which the NSA Group Subsidiaries are entitled
hereunder. AFC shall forward to the NSA Group Subsidiaries any such refund
promptly after the refund is received.

         (5) AFC shall promptly notify the NSA Group Subsidiaries in writing
upon receipt by AFC or any of its affiliate members, of notice of any pending or
threatened audit, assessment, or judicial administrative proceeding involving
taxes with respect to the Affiliated Group for which the NSA Group Subsidiaries
would be required to indemnify AFC pursuant to Section (3) above, provided the
failure of AFC to give such notice shall not relieve the NSA Group Subsidiaries
of its indemnification obligations under Section (3), except to the extent the
NSA Group Subsidiaries is materially prejudiced thereby.

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         (6) The NSA Group Subsidiaries shall promptly notify AFC in writing
upon receipt by the NSA Group Subsidiaries of notice of any pending or
threatened audit, assessment, or judicial administrative proceeding involving
taxes with respect to the NSA Group Subsidiaries for which AFC would be required
to indemnify the NSA Group Subsidiaries pursuant to Section (2) above, provided
the failure of the NSA Group Subsidiaries to give such notice shall not relieve
AFC of its indemnification obligations under Section (2), except to the extent
AFC is materially prejudiced thereby.

         (7) The NSA Group Subsidiaries shall have the right to participate in,
but not control, at their own expense, a tax proceeding to the extent it relates
to pre-closing taxes which may be the subject of indemnification by the NSA
Group Subsidiaries pursuant to Section (3) and to employ counsel of its choice
at its expense. AFC shall not compromise or settle any such tax proceeding
without the prior written consent of the NSA Group Subsidiaries, which consent
shall not be unreasonably withheld. If AFC shall not assume the defense of such
tax proceeding, then the NSA Group Subsidiaries may assume sole control over
such tax proceeding, at its own expense, without relieving the NSA Group
Subsidiaries of its indemnification obligation under Section (3).

         (8) AFC shall have the right to control, at its own expense, a tax
proceeding to the extent it relates to pre-closing taxes which may be the
subject of indemnification by AFC pursuant to Section (2) and to employ counsel
of its choice at its expense.

         IN WITNESS WHEREOF, this Agreement is hereby made effective on the date
and year first above written by the undersigned.

                         AMERICAN FINANCIAL CORPORATION

                         BY:    /s/ James C. Kennedy
                            -----------------------------------
                           Name:  James C. Kennedy
                           Title: Vice President, Deputy General
                                  Counsel and Secretary

                         NSA GROUP SUBSIDIARIES

                         ATLANTA CASUALTY COMPANY

                         BY:   /s/ Samuel J. Simon
                            -----------------------------------
                           Name: Samuel J. Simon
                           Title: Vice President

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                          LEADER INSURANCE COMPANY

                          BY:   /s/ Samuel J. Simon
                             -----------------------------------
                            Name: Samuel J. Simon
                            Title:   Vice President

                          INFINITY INSURANCE COMPANY

                          BY:   /s/ Samuel J. Simon
                             -----------------------------------
                            Name: Samuel J. Simon
                            Title:   Vice President

                          WINDSOR INSURANCE COMPANY

                          BY:   /s/ Samuel J. Simon
                             -----------------------------------
                            Name: Samuel J. Simon
                            Title:   Vice President

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