Document:

Exhibit 10.13

January 27, 2000

{name}
{address]

     Re: Promissory Note dated as of [____________] for $[______]

Dean [name]:

     The books and records of CNF Technologies, Inc. (the "Company") indicate
that you have provided us with a loan in the principal amount of One Hundred
Thousand Dollars (US $100,000), as evidenced by a note dated [________] (the
"Note"). In order to induce an equity investment in the Company, this letter
will constitute your formal agreement to extend the "Maturity Date" of the Note
(as the term Maturity Date is defined with the Note) to January 30, 2001, and
such date shall hereafter be referred to as the "Maturity Date" of the Note, as
amended hereby.

     All other terms and conditions of the Note shall remain in full force and
effect.

     Would you kindly indicate your intention to be legally bound by the terms
set forth herein as a formal amendment to the Note, by placing your name and
signature on the line provided below. Thank you for your consideration and
cooperation in this matter.

                                             Very truly yours,

                                             CNF Technologies, Inc.

                                             By:
                                                 ----------------------
                                                 David G. Thompson, CFO

Acknowledged and Agreed to by:

-----------------------------------
SignatureEXHIBIT "C"

THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE BEEN TAKEN BY THE
REGISTERED OWNER FOR INVESTMENT, AND WITHOUT A VIEW TO RESALE OR DISTRIBUTION
THEREOF, AND MAY NOT BE TRANSFERRED OR DISPOSED OF WITHOUT AN OPINION OF COUNSEL
SATISFACTORY TO THE ISSUER THAT SUCH TRANSFER OR DISPOSITION DOES NOT VIOLATE
THE SECURITIES ACT OF 1933, AS AMENDED, OR THE RULES AND REGULATIONS THEREUNDER.

                                     FORM OF

                                 PROMISSORY NOTE

$________                                                    Scottsdale, Arizona

                                                             ______________,1999

     FOR VALUE RECEIVED, CNF Technologies, Inc., a Delaware corporation (the
"Borrower"), hereby promises to pay to the order of, ___________________,
[a ______ corporation with a principal office at _____________________________
[an individual residing at __________________________________________________]
(the "Lender"), the principal sum of __________________________(US $__________)
payable in cash on the earlier of (i) the date the Company completes a private
placement of its equity securities which yields net proceeds to the Company of
at least $5,000,000; and (ii) June 30, 2001 with the earlier of such dates being
the "Maturity Date."

     The entire principal amount together with interest at the rate of ten
(10%) percent per annum, shall be paid on the Maturity Date.

     All payments (including prepayments) to be made by the Borrower hereunder,
whether on account of principal, interest or otherwise, shall be made without
set off or counterclaim and shall be made prior to 12:00 Noon, Pacific Standard
Time, on the Maturity Date thereof to the Lender at the address set forth above,
or such other place as Lender may from time to time designate in writing. If any
payment or action to be made or taken hereunder shall be stated to be or become
due on a day which is not a Business Day, such payment or action shall be made
or taken on the next following Business Day and such extension of time shall be
included in computing interest or fees, if any, in connection with such payment
or action.

     Any failure to repay the principal or interest due hereunder upon the
Maturity Date or any failure to adhere to the terms of this Note shall be
considered an Event of Default. Upon the occurrence of an Event of Default the
entire amount of the indebtedness evidenced by this Note hereby shall be
immediately due and payable. Upon the acceleration of the obligations evidenced
by this Note and failure by the Borrower to pay amounts then due hereunder,
Lender may proceed to protect, exercise and enforce all of its rights and
remedies under this Note. The remedies provided in this Note are cumulative and
concurrent, may be pursued in any order,

<PAGE>

separately, successively or together, may be exercised as often as occasion
therefor may arise, and shall be in addition to, and not in substitution for,
the rights and remedies which would otherwise be vested in Lender for the
recovery of damages, or otherwise, in the event of a breach of any of the
undertakings of the Borrower hereunder.

     This Note may not be modified, altered or amended, except by an agreement
in writing signed by the Borrower and the Lender.

     The Lender may not sell, assign or transfer this Note or any portion
hereof.

     This Note shall bind the Borrower and its successors and assigns, and the
benefits hereof shall inure to the benefit of the Lender and its successors and
assigns. All references herein to the "Borrower" and the "Lender" shall be
deemed to apply to the Borrower and the Lender, respectively, and their
respective successors and assigns.

     Borrower may not prepay the loan evidenced by this Note, without the
consent of the Lender.

     This Note and any other documents delivered in connection herewith and the
rights and obligations of the parties hereto and thereto shall for all purposes
be governed by and construed and enforced in accordance with the internal laws
of the State of Arizona without giving effect to its conflicts of law
principles.

     IN WITNESS WHEREOF, the undersigned, intending to be legally bound hereby,
has executed this Note effective as of the date above indicated.

                                   CNF TECHNOLOGIES, INC.

                                   By:
                                      -----------------------------------------
                                      Name:
                                      Title:<PAGE>

                               Register.com, Inc.
                                575 Eighth Avenue
                                   11th Floor
                            New York, New York 10018

                                January 31, 2000

Internet Web Builders, L.L.C.
1270 Avenue of the Americas, Suite 1905
New York, New York  10019

Attention:  Kenneth Greif

                  Re:      Register.com, Inc. Board of Directors
                           -------------------------------------
Dear Mr. Greif:

                  Reference is hereby made to the Amended and Restated
Stockholder Agreement (the "Agreement"), dated as of June 30, 1999, by and among
the Company, Internet Web Builders, L.L.C. ("IWB") and certain other
stockholders of the Company, pursuant to which Agreement IWB received among
other things the right to elect one member to the Board of Directors of the
Company ("the Board"). In consideration of the mutual agreements set forth
herein and other good and valuable consideration, the receipt and sufficiency of
which is hereby acknowledged, the Company and IWB agree as follows:

                  1. IWB hereby agrees to forfeit its right pursuant to Section
9(a) of the Agreement to designate one member to the Board, effective as of the
date hereof. IWB further agrees and understands that, pursuant to Section 9(d)
of the Agreement, the remaining members of the Board shall be entitled to fill
such position.

                  2. The Company hereby grants Mr. Greif (the "Observer"),
effective as of the date hereof, the non-transferrable right to attend all
meetings of the Board in a non-voting observer capacity and, in this respect,
shall give such Observer, at the same time such information is distributed to
the Board, copies of all notices, minutes, consents, correspondence and other
material that the Company provides to its directors, including being placed on
the circulation list for the contemporaneous receipt of all e-mail
correspondence. Such Observer may participate in discussions of matters brought
before the Board.
<PAGE>

                  The Company's agreement under this Section is subject to the
agreement by the Observer to hold in confidence all information and materials
(other than (a) information and materials that are or becomes generally
available to the public through no improper action or inaction on the part of
the Observer or (b) was properly in the Observer's possession or properly known
by the Observer without restriction prior to receipt from the Company or (c) was
rightfully disclosed to the Observer by a third party without restriction) that
he may receive or be given access to in connection with meetings of the Board
and to be held, with respect to all information so provided, to the same
standards as are Board members pursuant to their duties under Delaware law. The
Observer also agrees that the Observer may be excluded from certain confidential
"closed sessions" of the Board during such portions of its meeting at which the
presence of the Observer would (i) jeopardize the Company's attorney-client
privilege, (ii) be inappropriate for reasons of conflicts of interest or (iii)
otherwise be prohibited by law as advised by legal counsel to the Company.

                  The rights of the Observer described in this Section shall
terminate upon the first to occur of: (a) the date that is eighteen months after
the closing of the initial public offering of the Company, (b) the closing of
any merger or other acquisition involving the Company in which the Company is
not the surviving corporation or in which the shareholders of the Company
immediately prior to such transaction own less than fifty percent of the voting
equity securities of the surviving corporation or entity immediately after such
transaction, (c) the date on which the Observer, in conjunction with members of
his immediate family or trusts held for the benefit of himself or his immediate
family, shall no longer be the beneficial holder of at least 5% of the
outstanding securities of the Company or (d) upon the mailing by the Observer of
a letter by certified mail to the Company announcing his intention to terminate
his rights hereunder.

                  3. This letter agreement shall supersede any and all prior or
contemporaneous agreements between the parties hereto only with respect to the
specific subject matter hereof, and shall be governed by and construed
exclusively in accordance with the internal laws of the State of New York,
without giving effect to the principles of conflicts of law. This letter
agreement may be amended only by a writing signed by the parties hereto. If one
or more provisions of this agreement are held to be unenforceable under
applicable law, then such provisions(s) will be excluded from this agreement and
the balance of this agreement will be interpreted as if such provisions(s) were
so excluded and will be enforceable in accordance with its terms. Nothing in
this letter agreement, express or implied, is intended to confer upon any
person, other than the parties hereto and their successors and assigns, any
rights or remedies under or by reason of this letter agreement.

                  This letter agreement may be executed in counterparts, each of
which shall be deemed an original, but all of which together shall constitute
one and the same instrument.

<PAGE>

                  Please indicate your acceptance of the foregoing provisions of
this letter agreement by signing where indicated and returning it to the
undersigned.

                                               Sincerely,

                                               REGISTER.COM, INC.

                                               By:   /s/ Richard D. Forman
                                                    --------------------------
                                                     Name: Richard D. Forman
                                                     Title: President and CEO

ACCEPTED AND AGREED:
-------------------

INTERNET WEB BUILDERS, L.L.C.

By:   /s/ Kenneth Greif
      ---------------------------
      Name: Kenneth Greif
      Title:  Managing Member

/s/ Kenneth Greif
----------------------
Kenneth Greif

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