Exhibit 99.1

                            LETTER  OF  TRANSMITTAL

                             TO TENDER FOR EXCHANGE
                     10 1/2% SENIOR DISCOUNT NOTES DUE 2004

                                       OF

                                TELEGROUP, INC.

       PURSUANT TO THE PROSPECTUS DATED  [                       ], 1997

THE EXCHANGE OFFER WILL EXPIRE AT 5:00 P.M., NEW YORK CITY TIME, ON [        ],
1998 UNLESS EXTENDED.

          TO:  [_]     AS EXCHANGE AGENT


By Registered or Certified Mail:    By Overnight Courier:    By Hand:
 Certified Mail:

                                 By  Facsimile:

                            Confirm  by  telephone:

 
     Delivery of this instrument to an address other than as set forth above or
transmission of instructions via a facsimile number other than the one listed
above will not constitute a valid delivery. The instructions accompanying this
Letter of Transmittal should be read carefully before this Letter of Transmittal
is completed.

     The undersigned acknowledges that he or she has received the Prospectus,
dated [                    ], 1997 (the "Prospectus"), of TELEGROUP, Inc.  (the
"Company") and this Letter of Transmittal  (the "Letter of Transmittal"), which
together constitutes the Company's offer (the "Exchange Offer") to exchange its
10 1/2 % Senior Discount Notes due 2004 (the "Exchange Notes") for an equal
principal amount of its 10 1/2% Senior Discount Notes due 2004 (the "Old Notes"
and, together with the Exchange Notes, the "Notes"). The terms of the Exchange
Notes are identical in all material respects to the Old Notes, except that the
Exchange Notes have been registered under the Securities Act of 1933, as amended
(the "Securities Act"), and, therefore, will not bear legends restricting their
transfer and will not contain certain provisions relating to an increase in the
interest rate which were included in the Old Notes under certain circumstances
relating to the timing of the Exchange Offer. The term "Expiration Date" shall
mean 5:00 p.m., New York City time, on [                 ], 1998, unless the
Company, in its sole discretion, extends the Exchange Offer, in which case the
term shall mean the latest date and time to which the Exchange Offer is
extended. Capitalized terms used but not defined herein have the meaning given
to them in the Prospectus.

     The Letter of Transmittal is to be used by holders of Old Notes if
certificates are to be forwarded herewith. Holders of Old Notes whose
certificates are not immediately available, or who are unable to deliver their
certificates and all other documents required by this Letter of Transmittal to
the Exchange Agent on or prior to the Expiration Date, must tender their Old
Notes according to the guaranteed delivery procedures set forth in "The Exchange
Offer--Guaranteed Delivery Procedures" section of the Prospectus.   See
Instruction 1.

     The term "holder" with respect to the Exchange Offer means any person in
whose name Old Notes are registered on the books of the Company or any other
person who has obtained a properly completed bond power from the registered
holder. The undersigned has completed, executed and delivered this Letter of
Transmittal to indicate the action the undersigned desires to take with respect
to the Exchange Offer. Holders who wish to tender their Old Notes must complete
this Letter of Transmittal in its entirety.

     The undersigned acknowledges that if it is a broker-dealer holding Old
Notes acquired for its own account as a result of market-making activities or
other trading activities (other than Old Notes acquired directly from the
Company), such holder may be deemed to be an "underwriter" within the meaning of
the Securities Act and, therefore, must deliver a prospectus meeting the
requirements of the Securities Act in connection with any resale of Exchange
Notes received in respect of such Old Notes pursuant to the Exchange Offer.
Notwithstanding the foregoing, the undersigned shall not be deemed to admit that
it is an "underwriter" within the meaning of such term under the Securities Act.

                  PLEASE READ THE ENTIRE LETTER OF TRANSMITTAL
             CAREFULLY BEFORE COMPLETING THE LETTER OF TRANSMITTAL

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             DESCRIPTION OF 10 1/2% SENIOR DISCOUNT NOTES DUE 2004

AGGREGATE           PRINCIPAL AMOUNT               CERTIFICATE
PRINCIPAL           TENDERED (MUST BE IN           NUMBER(S)
AMOUNT              INTEGRAL MULTIPLES
REPRESENTED BY      OF $1,000)* NAMES AND
CERTIFICATE(S)      ADDRESS(ES) OF
                    REGISTERED HOLDER(S)
                    (PLEASE FILL IN, IF BLANK)

 
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- --------------------------------------------------------------------------------
 
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*Unless indicated in the column labeled "Principal Amount Tendered," any
tendering holder of 10 1/2% Senior Discount Notes due 2004 will be deemed to
have tendered the entire aggregate principal amount represented by the column
labeled "Aggregate Principal Amount Represented by Certificate(s)." If the space
provided above is inadequate, list the certificate numbers and principal amounts
on a separate signed schedule and affix the list to this Letter of Transmittal.
The minimum permitted tender is $1,000 in principal amount. All other tenders
must be integral multiples of $1,000.

CHECK HERE IF TENDERED OLD NOTES ARE BEING DELIVERED PURSUANT TO A NOTICE OF
GUARANTEED DELIVERY PREVIOUSLY SENT TO THE EXCHANGE AGENT AND COMPLETE THE
FOLLOWING (SEE INSTRUCTION 1):

Name(s) of Registered Holder(s)

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

Window Ticket Number (if any)

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

Date of Execution of Notice of Guaranteed Delivery

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

Name of Institution which Guaranteed Delivery

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


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CHECK  HERE  IF  YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10 ADDITIONAL
COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR SUPPLEMENTS THERETO:

Name:

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

Address:

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

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

SPECIAL REGISTRATION INSTRUCTIONS        SPECIAL DELIVERY INSTRUCTIONS

(SEE INSTRUCTIONS 4, 5 AND 6)            (SEE INSTRUCTIONS 4, 5 AND 6)
 
To be completed ONLY if                 To be completed ONLY if certificates
certificates for Old Notes in a         for Old Notes in a principal amount
 principal amount not tendered, or      not tendered, or Exchange Notes
 tendered, or Exchange Notes issued     issued in exchange for Old Notes
 in exchange for Old Notes accepted     accepted for exchange, are to be sent
 for exchange are to be issued in the   to someone other than the
 name of someone other than the         undersigned, or to the undersigned at
 undersigned.                           an address  other than the shown
                                        above.
Issue certificate (s) to:
                                        Deliver certificate (s) to:
 
Name:                                   Name:
     ---------------------------             ----------------------------
       (Please Print)                          (Please Print)
 
Address:                                Address: 
        ------------------------                -------------------------

        ------------------------                -------------------------
           (Include Zip Code)                       (Include Zip Code)


 
(Tax Identification or Social           (Tax Identification or Social
 Security No.)                          Security No.)
 
- ------------------------------          ------------------------------- 



Ladies and Gentlemen:

     Subject to the terms and conditions of the Exchange Offer, the undersigned
hereby tenders to the Company the principal amount of Old Notes indicated above.
Subject to and effective upon the acceptance for exchange of the principal
amount of Old Notes tendered in accordance with this Letter of Transmittal, the
undersigned sells, assigns and transfers to, or 

                                       4

 
upon the order of, the Company all right, title and interest in and to the Old
Notes tendered hereby. The undersigned hereby irrevocably constitutes and
appoints the Exchange Agent its agent and attorney-in-fact (with full knowledge
that the Exchange Agent also acts as the agent of the Company) with respect to
the tendered Old Notes with full power of substitution to (i) deliver
certificates for such Old Notes to the Company and deliver all accompanying
evidences of transfer and authenticity to, or upon the order of, the Company and
(ii) present such Old Notes for transfer on the books of the Company and receive
all benefits and otherwise exercise all rights of beneficial ownership of such
Old Notes, all in accordance with the terms of the Exchange Offer. The power of
attorney granted in this paragraph shall be deemed to be irrevocable and coupled
with an interest.

     The undersigned hereby represents and warrants that he or she has full
power and authority to tender, sell, assign and transfer the Old Notes tendered
hereby and that the Company will acquire good and unencumbered title thereto,
free and clear of all liens, restrictions, charges and encumbrances and not
subject to any adverse claim, when the same are acquired by the Company. The
undersigned and any beneficial owner of Old Notes hereby further represent that
any Exchange Notes acquired in exchange for Old Notes tendered hereby will have
been acquired in the ordinary course of business of the undersigned and any such
beneficial owner of Old Notes receiving such Exchange Notes, that neither the
holder nor any such beneficial owner is participating in, intends to participate
in or has an arrangement or understanding with any person to participate in the
distribution of such Exchange Notes and that neither the holder nor any such
beneficial owner is an "affiliate," as defined in Rule 405 under the Securities
Act, of the Company. The undersigned and each beneficial owner acknowledge and
agree that any person participating in the Exchange Offer for the purpose of
distributing the Exchange Notes must comply with the registration and prospectus
delivery requirements of the Securities Act in connection with any secondary
resale transactions of the Exchange Notes acquired by such person and may not
rely on the position of the Staff of the Securities and Exchange Commission set
forth in the no-action letters discussed in the Prospectus under the caption
"The Exchange Offer." If the undersigned is not a broker- dealer, the
undersigned represents that it is  not engaged in, and does not intend to engage
in, a public distribution of Exchange Notes. The undersigned and each beneficial
owner will, upon request, execute and deliver any additional documents deemed by
the Exchange Agent or the Company to be necessary or desirable to complete the
assignment, transfer and purchase of the Old Notes tendered hereby.

     For purposes of the Exchange Offer, the Company shall be deemed to have
accepted validly tendered Old Notes when, as and if the Company has given oral
or written notice thereof to the Exchange Agent.

     If any tendered Old Notes are not accepted for exchange pursuant to the
Exchange Offer for any reason, certificates for any such unaccepted Old Notes
will be returned, without expense, to the undersigned at the address shown below
or at a different address as may be indicated herein under "Special Delivery
Instructions" as promptly as practicable after the Expiration Date.

     All authority conferred or agreed to be conferred by this Letter of
Transmittal shall survive the death, incapacity or dissolution of the
undersigned, and every obligation of the undersigned under this Letter of
Transmittal shall be binding upon the undersigned's heirs, personal
representatives, successors and assigns.

     The undersigned understands that tenders of Old Notes pursuant to the
procedures described under the caption "The Exchange Offer--Procedures for
Tendering" in the Prospectus and in the instructions hereto will constitute a
binding agreement between the undersigned and the Company upon the terms and
subject to the conditions of the Exchange Offer, subject only to withdrawal of
such tenders on the terms set forth in the Prospectus under the caption "The
Exchange Offer--Withdrawal of Tenders."

     Unless otherwise indicated under "Special Registration Instructions,"
please issue the certificates representing the Exchange Notes issued in exchange
for the Old Notes accepted for exchange and any certificates for Old Notes not
tendered or not exchanged, in the name(s) of the undersigned. Similarly, unless
otherwise indicated under "Special Delivery Instructions," please send the
certificates representing the Exchange Notes issued in exchange for the Old
Notes accepted for 

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exchange and any certificates for Old Notes not tendered or not exchanged (and
accompanying documents, as appropriate) to the undersigned at the address shown
below the undersigned's signature(s). In the event that both "Special
Registration Instructions" and "Special Delivery Instructions" are completed,
please issue the certificates representing the Exchange Notes issued in exchange
for the Old Notes accepted for exchange in the name(s) of, and return any
certificates for Old Notes not tendered or not exchanged to, the person(s) so
indicated. The undersigned understands that the Company has no obligation
pursuant to the "Special Registration Instructions" and "Special Delivery
Instructions" to transfer any Old Notes from the name of the registered
holder(s) thereof if the Company does not accept for exchange any of the Old
Notes so tendered.

     Holders who wish to tender their Old Notes and whose Old Notes are not
immediately available or who cannot deliver their certificates and all other
documents required by this Letter of Transmittal to the Exchange Agent prior to
the Expiration Date, may tender their Old Notes according to the guaranteed
delivery procedures set forth in the Prospectus under the caption "The Exchange
Offer--Guaranteed Delivery Procedures." See Instruction 1 regarding the
completion of this Letter of Transmittal printed below.

                        PLEASE SIGN HERE WHETHER OR NOT
                 OLD NOTES ARE BEING PHYSICALLY TENDERED HEREBY

X
Date: 
      ----------------------

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X
Date:
      ----------------------

- --------------------------------------------------------------------------------
Signature(s) of Registered Holder(s) or Authorized Signatory

Area Code and Telephone Number:

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

     The above lines must be signed by the registered holder(s) as their name(s)
appear(s) on the Old Notes or by person(s) authorized to become registered
holder(s) by a properly completed bond power from the registered holder(s), a
copy of which must be transmitted with this Letter of Transmittal. If the Old
Notes to which this Letter of Transmittal relate are held of record by two or
more joint holders, then all such holders must sign this Letter of Transmittal.
If signature is by a trustee, executor, administrator, guardian, attorney-in-
fact, officer of a corporation or other person acting in a fiduciary or
representative capacity, then such person must (i) set forth his or her full
title below and (ii) unless waived by the Company, submit evidence satisfactory
to the Company of such person's authority so to act. See Instruction 4 regarding
the completion of this Letter of Transmittal printed below.

Name(s):
        ---------------------------------------------------------
          (Please Print)

Capacity:
         --------------------------------------------------------
          (Please Print)


Address:
         --------------------------------------------------------
          (Include Zip Code)

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Signature(s) Guaranteed by an Eligible Institution:
(If required by Instruction 4)


- --------------------------------------------------------------------------------
(Authorized Signature)



- --------------------------------------------------------------------------------
(Title)


- --------------------------------------------------------------------------------
(Name of Firm)


Date: 
     -------------------------------------


                                       7

 
                                  INSTRUCTIONS

                    FORMING PART OF THE TERMS AND CONDITIONS

                             OF THE EXCHANGE OFFER

1.   DELIVERY OF THIS LETTER OF TRANSMITTAL AND OLD NOTES; GUARANTEED DELIVERY
PROCEDURES. The tendered Old Notes as well as a properly completed and duly
executed copy of this Letter of Transmittal or facsimile hereof and any other
documents required by this Letter of Transmittal must be received by the
Exchange Agent at its address set forth herein prior to 5:00 p.m., New York City
time, on the Expiration Date. The method of delivery of the tendered Old Notes,
this Letter of Transmittal and all other required documents to the Exchange
Agent is at the election and risk of the holder and, except as otherwise
provided below, the delivery will be deemed made only when actually received by
the Exchange Agent. Instead of delivery by mail, it is recommended that the
holder use an overnight or hand delivery service. In all cases, sufficient time
should be allowed to assure timely delivery. No Letter of Transmittal or Old
Notes should be sent to the Company.

     Holders who wish to tender their Old Notes and (i) whose Old Notes are not
immediately available or (ii) who cannot deliver their Old Notes, this Letter of
Transmittal or any other documents required hereby to the Exchange Agent prior
to the Expiration Date must tender their Old Notes according to the guaranteed
delivery procedures set forth in the Prospectus. Pursuant to such procedure: (a)
such tender must be made by or through an Eligible Institution (defined below);
(b) prior to the Expiration Date, the Exchange Agent must have received from the
Eligible Institution a properly completed and duly executed Notice of Guaranteed
Delivery (by facsimile transmission, mail or hand delivery) setting forth the
name and address of the holder, the certificate number or numbers of such Old
Notes and the principal amount of Old Notes tendered, stating that the tender is
being made thereby and guaranteeing that, within three New York Stock Exchange
trading days after the Expiration Date, this Letter of Transmittal (or facsimile
hereof) together with the certificate(s) representing the Old Notes and any
other required documents will be deposited by the Eligible Institution with the
Exchange Agent; and (c) such properly completed and executed Letter of
Transmittal (or facsimile hereof), as well as the certificate(s) representing
all tendered Old Notes in proper form for transfer and all other documents
required by this Letter of Transmittal must be received by the Exchange Agent
within three New York Stock Exchange trading days after the Expiration Date, all
as provided in the Prospectus under the caption "The Exchange Offer--Guaranteed
Delivery Procedures." Any holder who wishes to tender his or her Old Notes
pursuant to the guaranteed delivery procedures described above must ensure that
the Exchange Agent receives the Notice of Guaranteed Delivery prior to 5:00
p.m., New York City time, on the Expiration Date. Upon request to the Exchange
Agent, a Notice of Guaranteed Delivery will be sent to holders who wish to
tender their Old Notes according to the guaranteed delivery procedures set forth
above.

     All questions as to the validity, form, eligibility (including time of
receipt), acceptance of tendered Old Notes, and withdrawal of tendered Old Notes
will be determined by the Company in its sole discretion, which determination
will be final and binding. The Company reserves the absolute right to reject any
and all Old Notes not properly tendered or any Old Notes the Company's
acceptance of which would, in the opinion of counsel for the Company, be
unlawful. The Company also reserves the right to waive any irregularities or
conditions of tender as to particular Old Notes. The Company's interpretation of
the terms and conditions of the Exchange Offer (including the instructions in
this Letter of Transmittal) shall be firm and binding on all parties. Unless
waived, any defects or irregularities in connection with tenders of Old Notes
must be cured within such time as the Company shall determine. Neither the
Company, the Exchange Agent nor any other person shall be under any duty to give
notification of defects or irregularities with respect to tenders of Old Notes,
nor shall any of them incur any liability for failure to give such notification.
Tenders of Old Notes will not be deemed to have been made until such defects or
irregularities have been cured or waived. Any Old Notes received by the Exchange
Agent that are not properly tendered and as to which the defects or
irregularities have not been cured or waived will be returned by the Exchange
Agent to the tendering holders, unless otherwise provided in this Letter of
Transmittal, as soon as practicable following the Expiration 

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Date.

2.   TENDER BY HOLDER. Only a holder of Old Notes may tender such Old Notes in
the Exchange Offer. Any beneficial owner of Old Notes who is not the registered
holder and who wishes to tender should arrange with such registered holder to
execute and deliver this Letter of Transmittal on such owner's behalf or must,
prior to completing and executing this Letter of Transmittal and delivering his
or her Old Notes, either make appropriate arrangements to register ownership of
the Old Notes in such owner's name or obtain a properly completed bond power
from the registered holder.

3.   PARTIAL TENDERS. Tenders of Old Notes will be accepted only in integral
multiples of $1,000. If less than the entire principal amount of any Old Notes
is tendered, the tendering holder should fill in the principal amount tendered
in the fourth column of the box entitled "Description of 10 1/2% Senior Discount
Notes due 2004" above. The entire principal amount of any Old Notes delivered to
the Exchange Agent will be deemed to have been tendered unless otherwise
indicated. If the entire principal amount of all Old Notes is not tendered, then
Old Notes for the principal amount of Old Notes not tendered and a certificate
or certificates representing Exchange Notes issued in exchange for any Old Notes
accepted will be sent to the holder at his or her registered address, unless a
different address is provided in the appropriate box on this Letter of
Transmittal, promptly after the Old Notes are accepted for exchange.

4.     SIGNATURES ON THE LETTER OF TRANSMITTAL; BOND POWERS AND ENDORSEMENTS;
GUARANTEE OF SIGNATURES. If this Letter of Transmittal (or facsimile hereof) is
signed by the registered holder(s) of the Old Notes tendered hereby, the
signature must correspond with the name(s) as written on the face of the Old
Notes without alteration, enlargement or any change whatsoever.

     If this Letter of Transmittal (or facsimile hereof) is signed by the
registered holder or holders of Old Notes tendered and the certificate or
certificates for Exchange Notes issued in exchange therefor is to be issued (or
any untendered principal amount of Old Notes is to be reissued) to the
registered holder and neither the "Special Delivery Instructions" nor the
"Special Registration Instructions" has been completed, then such holder need
not and should not endorse any tendered Old Notes, nor provide a separate bond
power. In any other case, such holder must either properly endorse the Old Notes
tendered or transmit a properly completed separate bond power with this Letter
of Transmittal with the signatures on the endorsement or bond power guaranteed
by an Eligible Institution.

     If this Letter of Transmittal (or facsimile hereof) is signed by a person
other than the registered holder or holders of any Old Notes listed, such Old
Notes must be endorsed or accompanied by appropriate bond powers in each case
signed as the name of the registered holder or holders appears on the Old Notes.

     If this Letter of Transmittal (or facsimile hereof) or any Old Notes or
bond powers are signed by trustees, executors, administrators, guardians,
attorneys-in-fact, or officers of corporations or others acting in a fiduciary
or representative capacity, such persons should so indicate when signing, and,
unless waived by the Company, evidence satisfactory to the Company of their
authority so to act must be submitted with this Letter of Transmittal.

     Endorsements on Old Notes or signatures on bond powers required by this
Instruction 4 must be guaranteed by an Eligible Institution which is a member of
(a) the Securities Transfer Agents Medallion Program, (b) the New York Stock
Exchange Medallion Signature Program or (c) the Stock Exchange Medallion
Program.

     Except as otherwise provided below, all signatures on this Letter of
Transmittal must be guaranteed by a firm that is a member of a registered
national securities exchange or the National Association of Securities Dealers,
Inc., a commercial bank or trust company having an office or correspondent in
the United States or an "eligible guarantor institution" within the meaning of
Rule 17Ad-15 under the Securities Exchange Act of 1934, as amended (an "Eligible
Institution"). Signatures on this Letter of Transmittal need not be guaranteed
if (a) this Letter of Transmittal is signed by the registered holder(s) of the
Old Notes tendered herewith and such holder(s) have not completed the box set
forth herein entitled "Special Registration 

                                       9

 
Instructions" or the box entitled "Special Delivery Instructions" or (b) such
Old Notes are tendered for the account of an Eligible Institution.

5.   SPECIAL REGISTRATION AND DELIVERY INSTRUCTIONS. Tendering holders should
indicate, in the applicable box or boxes, the name and address to which Exchange
Notes or substitute Old Notes for principal amounts not tendered or not accepted
for exchange are to be issued or sent, if different from the name and address of
the person signing this Letter of Transmittal. In the case of issuance in a
different name, the taxpayer identification or social security number of the
person named must also be indicated.

6.   TRANSFER TAXES. The Company will pay all transfer taxes, if any, applicable
to the exchange of Old Notes pursuant to the Exchange Offer. If, however,
certificates representing Exchange Notes or Old Notes for principal amounts not
tendered or accepted for exchange are to be delivered to, or are to be
registered in the name of, any person other than the registered holder of the
Old Notes tendered hereby, or if tendered Old Notes are registered in the name
of any person other than the person signing this Letter of Transmittal, or if a
transfer tax is imposed for any reason other than the exchange of Old Notes
pursuant to the Exchange Offer, then the amount of any such transfer taxes
(whether imposed on the registered holder or on any other persons) will be
payable by the tendering holder. If satisfactory evidence of payment of such
taxes or exemption therefrom is not submitted with this Letter of Transmittal,
the amount of such transfer taxes will be billed directly to such tendering
holder.

     Except as provided in this Instruction 6, it will not be necessary for
transfer tax stamps to be affixed to the Old Notes listed in this Letter of
Transmittal.

7.   WAIVER OF CONDITIONS. The Company reserves the right, in its sole
discretion, to amend, waive or modify specified conditions in the Exchange Offer
in the case of any Old Notes tendered.

8.   MUTILATED, LOST, STOLEN OR DESTROYED OLD NOTES. Any tendering holder
whose Old Notes have been mutilated, lost, stolen or destroyed should contact
the Exchange Agent at the address indicated herein for further instructions.

9.   REQUESTS FOR ASSISTANCE OR ADDITIONAL COPIES. Questions and requests for
assistance and requests for additional copies of the Prospectus or this Letter
of Transmittal may be directed to the Exchange Agent at the address specified in
the Prospectus. Holders may also contact their broker, dealer, commercial bank,
trust company or other nominee for assistance concerning the Exchange Offer.

                                      10

 
                         (DO NOT WRITE IN SPACE BELOW)

CERTIFICATE
SURRENDERED         OLD NOTES TENDERED        OLD NOTES ACCEPTED



Delivery Prepared by   Checked by             Date


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