<PAGE>   1
                                                                    Exhibit 4.02

                  This Note is a Global Security within the meaning of the
Indenture hereinafter referred to and is registered in the name of the
Depository named below or a nominee of the Depository. This Note is not
exchangeable for Notes registered in the name of a Person other than the
Depository or its nominee except in the limited circumstances described herein
and in the Indenture, and no transfer of this Note (other than a transfer of
this Note as a whole by the Depository to a nominee of the Depository or by a
nominee of the Depository to the Depository or another nominee of the
Depository) may be registered except in the limited circumstances described
herein.

                  Unless this certificate is presented by an authorized
representative of The Euroclear System or Clearstream Banking, societe anonyme
(each a "Depository"), to the Company or its agent for registration of transfer,
exchange, or payment, and any certificate issued is registered in the name of
Citivic Nominees Limited or in such other name as is requested by an authorized
representative of the Depository (and any payment is made to Citivic Nominees
Limited or to such other entity as is requested by an authorized representative
of the Depository), ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch as the registered owner
hereof, Citivic Nominees Limited, has an interest herein.


                                 CITIGROUP INC.
REGISTERED                                                            REGISTERED

                                                              CUSIP: 172967 ____
                                                              ISIN: XS__________
                                                          Common Code: _________

No. R-0002-INT                                         up to (Yen)__,000,000,000

                  CITIGROUP INC., a Delaware corporation (the "Company", which
term includes any successor Person under the Indenture), for value received,
hereby promises to pay to Citivic Nominees Limited, or registered assigns, the
principal sum of up to (Yen)__,000,000,000 (or such other principal sum as has
been most lately endorsed on the Schedule of Exchanges of Interests hereto) on
_______, 20__ and to pay interest thereon from and including ______, 2000 or
from the most recent Interest Payment Date to which interest has been paid or
duly provided for, semi-annually on ______ and ______ of each year, commencing
______, 200_, at the rate of ____% per annum, until the principal hereof is paid
or made available for payment. The interest so payable, and punctually paid or
duly provided for, on any Interest Payment Date will, as provided in the
Indenture, be paid to the Person in whose name this Note is registered at the
close of business on the Record Date for such interest, which shall be the
______ or ______ (whether or not a Business Day) next preceding such Interest
Payment Date.
<PAGE>   2
                  Any such interest not so punctually paid or duly provided for
will forthwith cease to be payable to the holder on such Record Date and may
either be paid to the Person in whose name this Note is registered at the close
of business on a subsequent Record Date, such subsequent Record Date to be not
less than five days prior to the date of payment of such defaulted interest,
notice whereof shall be given to holders of Notes of this series not less than
15 days prior to such subsequent Record Date, or be paid at any time in any
other lawful manner not inconsistent with the requirements of any securities
exchange on which the Notes of this series may be listed, and upon such notice
as may be required by such exchange, all as more fully provided in the
Indenture.

         Interest hereon will be calculated on the basis of the actual number of
days in the relevant period and a year of 365 days.

         If either a date for payment of principal or interest on the Notes or
the Maturity of the Notes falls on a day that is not a Business Day, the related
payment of principal or interest will be made on the next succeeding Business
Day as if made on the date the payment was due. No interest will accrue on any
amounts payable for the period from and after the date for payment of principal
or interest on the Notes or the Maturity of the Notes. For these purposes,
"Business Day" means any day which is a day on which commercial banks and
foreign exchange markets settle payments and are open for general business
(including dealings in foreign exchange and foreign currency deposits) in (a)
the relevant place of payment and (b) each of The City of New York, Tokyo and
London.

                  Payment of the principal of and interest on this Note will be
made at the office or agency of the Company maintained for that purpose in
London or The City of New York in Japanese Yen.

                  Reference is hereby made to the further provisions of this
Note set forth on the reverse hereof, which further provisions shall for all
purposes have the same effect as if set forth at this place.

                  Unless the certificate of authentication hereon has been
executed by the Trustee or by the authenticating agent on behalf of the Trustee
referred to on the reverse hereof by manual signature, this Note shall not be
entitled to any benefit under the Indenture or be valid or obligatory for any
purpose.
<PAGE>   3
                  IN WITNESS WHEREOF, the Company has caused this instrument to
be duly executed under its corporate seal.

Dated:  _____, 2000

                                    CITIGROUP INC.



                                    By:_________________________________
                                    Title:



ATTEST:

By:___________________
Assistant Secretary
<PAGE>   4
                  This is one of the Notes of the series issued under the
within-mentioned Indenture.

Dated: _____, 2000
                                    THE BANK OF NEW YORK,
                                    as Trustee


                                    By:_________________________________
                                          Name:
                                          Title:

                                    -or-

                                    CITIBANK, N.A., LONDON OFFICE,
                                         as Authenticating Agent


                                    By:_________________________________
                                          Name:
                                          Title:
<PAGE>   5
                  This Note is one of a duly authorized issue of Securities of
the Company (the "Notes"), issued and to be issued in one or more series under
the Indenture, dated as of March 15, 1987 (as amended and supplemented to date,
the "Indenture"), between the Company and The Bank of New York, as Trustee (the
"Trustee", which term includes any successor trustee under the Indenture), to
which Indenture and all indentures supplemental thereto reference is hereby made
for a statement of the respective rights, limitations of rights, duties and
immunities thereunder of the Company, the Trustee and the holders of the Notes
and of the terms upon which the Notes are, and are to be, authenticated and
delivered. This Note is one of the series designated on the face hereof,
initially issued in the aggregate principal amount of (Yen)55,000,000,000.

                 So long as the Notes of this series are in the form of Global
Securities only, all Notes of this series will collectively be evidenced (a) by
the two Global Securities for this series registered in the name of Cede & Co.
and bearing registration numbers R-0001-DTC-_ and R-0001-DTC-_ (together, the
"DTC Global Notes") and (b) by this Global Note (the "International Global
Note"). The DTC Global Notes and the International Global Note will at all times
collectively represent the aggregate principal amount of this series outstanding
from time to time. If at any time a portion of the International Global Note is
exchanged for an interest in a DTC Global Note, the principal amount of a DTC
Global Note shall be increased by the amount of such portion, and that DTC
Global Note shall be endorsed on the Schedule of Exchanges of Interests thereto
to reflect such principal increase, subject to the limitation that in no event
may the principal amount of a DTC Global Note be greater than the equivalent in
U.S. dollars of $400,000,000. If at any time a portion of a DTC Global Note is
exchanged for an interest in the International Global Note, the principal amount
of that DTC Global Note shall be decreased by the amount of such portion, and
that DTC Global Note shall be endorsed on the Schedule of Exchanges of Interests
thereto to reflect such principal decrease. To ascertain the U.S. dollar
equivalent of the principal amount endorsed on the Schedule of Exchanges of
Interests attached to a DTC Global Note, inquiry shall be made of the exchange
agent under the Fiscal Agency Agreement, and the U.S. dollar equivalent quoted
by such exchange agent (and the date of such quote) shall be noted on such
Schedule of Exchanges of Interests next to the corresponding Yen amount.

                  If an event of default (as defined in the Indenture) with
respect to Notes of this series shall occur and be continuing, the principal of
the Notes of this series may be declared due and payable in the manner and with
the effect provided in the Indenture.

                  The Indenture contains provisions for defeasance at any time
of the entire indebtedness of this Note upon compliance by the Company with
certain conditions set forth in Sections 11.03 and 11.04 thereof, which
provisions apply to this Note.

                  The Indenture contains provisions permitting the Company and
the Trustee, without the consent of the holders of Securities, to establish,
among other things, the form and terms of any series of Securities issuable
thereunder by one or more supplemental indentures, and, with the consent of the
holders of not less than 66 2/3% in aggregate principal amount of
<PAGE>   6
Securities at the time Outstanding which are affected thereby, to modify the
Indenture or any supplemental indenture or the rights of the holders of
Securities of such series to be affected, provided that no such modification
will (x) extend the fixed maturity of any Securities, reduce the rate or extend
the time of payment of interest thereon, reduce the principal amount thereof or
the premium, if any, thereon, reduce the amount of the principal of Original
Issue Discount Securities payable on any date, change the currency in which
Securities are payable, or impair the right to institute suit for the
enforcement of any such payment on or after the maturity thereof, without the
consent of the holder of each Security so affected, or (y) reduce the aforesaid
percentage of Securities of any series the consent of the holders of which is
required for any such modification without the consent of the holders of all
Securities of such series then Outstanding, or (z) modify, without the written
consent of the Trustee, the rights, duties or immunities of the Trustee.

                  No reference herein to the Indenture and no provision of this
Note or of the Indenture shall alter or impair the obligation of the Company,
which is absolute and unconditional, to pay the principal of and interest on
this Note at the times, place and rate, and in the coin or currency, herein
prescribed.

                  This Note is a Global Security registered in the name of a
nominee of the Depository. This Note is exchangeable for Notes registered in the
name of a person other than the Depository or its nominee only in the limited
circumstances hereinafter described. Unless and until it is exchanged in whole
or in part for definitive Notes in certificated form, this Note may not be
transferred except as a whole by the Depository to a nominee of the Depository
or by a nominee of the Depository to the Depository or another nominee of the
Depository.

                  The Notes represented by this Global Security are exchangeable
for definitive Notes in certificated form of like tenor as such Notes in
denominations of (Yen)1,000,000 and integral multiples thereof only if (i) the
Depository notifies the Company that it is unwilling or unable to continue as
Depository for the DTC Global Notes or (ii) the Depository ceases to be a
clearing agency registered under the Securities Exchange Act of 1934, as
amended, or (iii) both the Euroclear System and Clearstream Banking, societe
anonyme, notify the Company that they are unwilling or unable to continue as a
clearing system for the International Global Note or (iv) the Company in its
sole discretion decides to allow the Notes to be exchanged for definitive Notes
in registered form. Any Notes that are exchangeable pursuant to the preceding
sentence are exchangeable for certificated Notes issuable in authorized
denominations and registered in such names as the Depository shall direct. As
provided in the Indenture and subject to certain limitations therein set forth,
the transfer of definitive Notes in certificated form is registrable in the
register maintained by the Company for such purpose, upon surrender of the
definitive Note for registration of transfer at the office or agency of the
Company in any place where the principal of and interest on the definitive Note
are payable, duly endorsed by, or accompanied by a written instrument of
transfer in form satisfactory to the Company and the registrar duly executed by,
the holder thereof or his attorney duly authorized in writing, and thereupon one
or more new Notes of this series and of like tenor, of authorized denominations
and for the same aggregate principal amount, will be issued to the designated
transferee or transferees. Subject to the foregoing, this Note is not
exchangeable, except for a Global Security or Global Securities of
<PAGE>   7
this issue of the same principal amount to be registered in the name of the
Depository or its nominee.

                  No service charge shall be made for any such registration of
transfer or exchange, but the Company may require payment of a sum sufficient to
cover any tax or other governmental charge payable in connection therewith.

                  Prior to due presentment of this Note for registration of
transfer, the Company, the Trustee and any agent of the Company or the Trustee
may treat the Person in whose name this Note is registered as the owner hereof
for all purposes, whether or not this Note be overdue, and neither the Company,
the Trustee nor any such agent shall be affected by notice to the contrary.

         The Company will pay additional amounts ("Additional Amounts") to the
beneficial owner of any Note that is a non-United States person in order to
ensure that every net payment on such Note will not be less, due to payment of
U.S. withholding tax, than the amount then due and payable. For this purpose, a
"net payment" on a Note means a payment by the Company or a paying agent,
including payment of principal and interest, after deduction for any present or
future tax, assessment or other governmental charge of the United States. These
Additional Amounts will constitute additional interest on the Note.

         The Company will not be required to pay Additional Amounts, however, in
any of the circumstances described in items (1) through (12) below.

         (1)      Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any tax, assessment or other
                  governmental charge that is imposed or withheld solely by
                  reason of the beneficial owner:

                  (a)      having a relationship with the United States as a
                           citizen, resident or otherwise;

                  (b)      having had such a relationship in the past or

                  (c)      being considered as having had such a relationship.

         (2)      Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any tax, assessment or other
                  governmental charge that is imposed or withheld solely by
                  reason of the beneficial owner:

                  (a)      being treated as present in or engaged in a trade or
                           business in the United States;

                  (b)      being treated as having been present in or engaged in
                           a trade or business in the United States in the past
                           or

                  (c)      having or having had a permanent establishment in the
                           United States.

         (3)      Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any tax, assessment or other
                  governmental charge that is imposed or withheld solely by
                  reason of the beneficial owner being or having been a:

                  (a)      personal holding company;

                  (b)      foreign personal holding company;
<PAGE>   8
                  (c)      foreign private foundation or other foreign
                           tax-exempt organization;
                  (d)      passive foreign investment company;
                  (e)      controlled foreign corporation or
                  (f)      corporation which has accumulated earnings to avoid
                           United States federal income tax.

         (4)      Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any tax, assessment or other
                  governmental charge that is imposed or withheld solely by
                  reason of the beneficial owner owning or having owned,
                  actually or constructively, 10 percent or more of the total
                  combined voting power of all classes of stock of the Company
                  entitled to vote.

For purposes of item (1) through (4) above, "beneficial owner" means a
fiduciary, settlor, beneficiary, member or shareholder of the holder if the
holder is an estate, trust, partnership, limited liability company, corporation
or other entity, or a person holding a power over an estate or trust
administered by a fiduciary holder.

         (5)      Additional Amounts will not be payable to any beneficial owner
                  of a Note that is a:
                  (a)      fiduciary;
                  (b)      partnership;
                  (c)      limited liability company or
                  (d)      other fiscally transparent entity
                  or that is not the sole beneficial owner of the Note, or any
                  portion of the Note. However, this exception to the obligation
                  to pay Additional Amounts will only apply to the extent that a
                  beneficiary or settlor in relation to the fiduciary, or a
                  beneficial owner or member of the partnership, limited
                  liability company or other fiscally transparent entity, would
                  not have been entitled to the payment of an Additional Amount
                  had the beneficiary, settlor, beneficial owner or member
                  received directly its beneficial or distributive share of the
                  payment.

         (6)      Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any tax, assessment or other
                  governmental charge that is imposed or withheld solely by
                  reason of the failure of the beneficial owner or any other
                  person to comply with applicable certification,
                  identification, documentation or other information reporting
                  requirements. This exception to the obligation to pay
                  Additional Amounts will only apply if compliance with such
                  reporting requirements is required by statute or regulation of
                  the United States or by an applicable income tax treaty to
                  which the United States is a party as a precondition to
                  exemption from such tax, assessment or other governmental
                  charge.

         (7)      Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any tax, assessment or other
                  governmental charge that is collected or imposed by any method
                  other than by withholding from a payment on a Note by the
                  Company or a paying agent.
<PAGE>   9
         (8)      Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any tax, assessment or other
                  governmental charge that is imposed or withheld by reason of a
                  change in law, regulation, or administrative or judicial
                  interpretation that becomes effective more than 15 days after
                  the payment becomes due or is duly provided for, whichever
                  occurs later.

         (9)      Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any tax, assessment or other
                  governmental charge that is imposed or withheld by reason of
                  the presentation by the beneficial owner of a Note for payment
                  more than 30 days after the date on which such payment becomes
                  due or is duly provided for, whichever occurs later.

         (10)     Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any:
                  (a)      estate tax;
                  (b)      inheritance tax;
                  (c)      gift tax;
                  (d)      sales tax;
                  (e)      excise tax;
                  (f)      transfer tax;
                  (g)      wealth tax;
                  (h)      personal property tax or
                  (i)      any similar tax, assessment or other governmental
                           charge.

         (11)     Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any tax, assessment, or other
                  governmental charge required to be withheld by any paying
                  agent from a payment of principal or interest on a Note if
                  such payment can be made without such withholding by any other
                  paying agent.

         (12)     Additional Amounts will not be payable if a payment on a Note
                  is reduced as a result of any combination of items (1) through
                  (11) above.

         Except as specifically provided herein, the Company will not be
required to make any payment of any tax, assessment or other governmental charge
imposed by any government or a political subdivision or taxing authority of such
government.

         As used in this Note, "United States person" means:

         (a)      any individual who is a citizen or resident of the United
                  States;
         (b)      any corporation, partnership or other entity created or
                  organized in or under the laws of the United States;
         (c)      any estate if the income of such estate falls within the
                  federal income tax jurisdiction of the United States
                  regardless of the source of such income and
         (d)      any trust if a United States court is able to exercise primary
                  supervision over its administration and one or more United
                  States persons have the authority to control all of the
                  substantial decisions of the trust.
<PAGE>   10
         Additionally, "non-United States person" means a person who is not a
United States person, and "United States" means the United States of America,
including the States and the District of Columbia, its territories, its
possessions and other areas within its jurisdiction.

         Except as provided below, the Notes may not be redeemed prior to
maturity.

         (1)      The Company may, at its option, redeem the Notes if:

                  (a)      the Company becomes or will become obligated to pay
                           Additional Amounts as described above;
                  (b)      the obligation to pay Additional Amounts arises as a
                           result of any change in the laws, regulations or
                           rulings of the United States, or an official position
                           regarding the application or interpretation of such
                           laws, regulations or rulings, which change is
                           announced or becomes effective on or after _____,
                           2000 and
                  (c)      the Company determines, in its business judgment,
                           that the obligation to pay such Additional Amounts
                           cannot be avoided by the use of reasonable measures
                           available to it, other than substituting the obligor
                           under the Notes or taking any action that would
                           entail a material cost to the Company.

         (2)      The Company may also redeem the Notes, at its option, if:
                  (a)      any act is taken by a taxing authority of the United
                           States on or after _____, 2000, whether or not such
                           act is taken in relation to the Company or any
                           affiliate, that results in a substantial probability
                           that the Company will or may be required to pay
                           Additional Amounts as described under above;
                  (b)      the Company determines, in its business judgment,
                           that the obligation to pay such Additional Amounts
                           cannot be avoided by the use of reasonable measures
                           available to it, other than substituting the obligor
                           under the Notes or taking any action that would
                           entail a material cost to the Company and
                  (c)      the Company receives an opinion of independent
                           counsel to the effect that an act taken by a taxing
                           authority of the United States results in a
                           substantial probability that the Company will or may
                           be required to pay the Additional Amounts described
                           under above, and delivers to the Trustee a
                           certificate, signed by a duly authorized officer,
                           stating that based on such opinion the Company is
                           entitled to redeem the Notes pursuant to their terms.

Any redemption of the Notes as set forth in clauses (1) or (2) above shall be in
whole, and not in part, and will be made at a redemption price equal to 100% of
the principal amount of the Notes Outstanding plus accrued interest thereon to
the date of redemption. Holders shall be given not less than 30 days nor more
than 60 days prior notice by the Trustee of the date fixed for such redemption.

                  All terms used in this Note which are defined in the Indenture
shall have the meanings assigned to them in the Indenture. The Notes are
governed by the laws of the State of New York.
<PAGE>   11
                       SCHEDULE OF EXCHANGES OF INTERESTS

                  The following exchanges of a part of this Note for an interest
in another Global Security or for a certificated Note, or exchanges of a part of
another Global Security or certificated Note for an interest in this Note, have
been made:

<TABLE>
<CAPTION>
                                                                         Principal Amount of this   Signature of
                  Amount of decrease in       Amount of increase in      Note following such        Authorized Officer
                  Principal Amount of this    Principal Amount of this   decrease (or increase)     of Trustee or
Date of Exchange  Note                        Note                                                  Fiscal Agent


<S>               <C>                         <C>                        <C>                        <C>
______, 2000      (original issuance)                                        (Y)__,000,000,000          __________________

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

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

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

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

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

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

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

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

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

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

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

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

------------------------------------------------------------------------------
</TABLE>

*    This Schedule may be used by the Trustee, Paying Agent, Fiscal Agent or
     other agent of the Company in respect of this Note, and, if so used, shall
     be deemed a part thereof for all purposes.