Document:

EXHIBIT 10.1
                                                                    ------------

November 1, 2006                                          [ELECTRONIC SENSOR
                                                          TECHNOLOGY, INC. LOGO]

Teong Lim
President
Electronic Sensor Technology, Inc.

Re:  Consulting Arrangement

Dear Teong:

     This is to summarize the arrangement for the consulting services after my
retirement effective November 1, 2006 based on the discussions we had in last
few weeks as follows:

     1.   I will accept an offer to be an in-house consultant for a period of
          six (6) month from November 1, 2006 to April 30, 2007. The main areas
          that I will continue to get involved and to concentrate my efforts
          will include the processing and issuance of the stock option grants to
          board directors and key employees when the SB-2 filing is approved by
          SEC; coordinating and advising on the marketing strategies in China
          and setting up the sales sub-channels as well as entering into new
          market segments; advising on the selection of the new COO/CEO; help
          establishing the 2007 operating budgets, and other topics or projects
          that the Company may be benefited from my experiences.
     2.   The above arrangement will be on a retainer basis. My fee shall be
          equal to approximately half of my current compensation, i.e. $3000
          bi-weekly, payable also bi-weekly to coincide with the company
          payrolls.
     3.   This is an informal arrangement between us and it can be terminated
          any time by either party with a 30-day notice.

     Should you agree that the above is the understanding between us, please
confirm this by signing at the space provided below and return a copy of this
letter to me for the record.

                                                               Sincerely,

                                                               /s/ Francis Chang
                                                               -----------------
                                                               Francis Chang

Agreed and Accepted:

/s/ Teong Lim
----------------------------------
Teong Lim, President
Electronic Sensor Technology, Inc.EXHIBIT 10.2
                                                                    ------------

March 15, 2006                                            [ELECTRONIC SENSOR
                                                          TECHNOLOGY, INC. LOGO]
Philip Y. Yee
5541 Adelina Court
Agoura Hills, CA  91301

Dear Mr. Yee:

Electronic Sensor Technology, Inc. is pleased to offer you the position of
Controller with the following compensation package:

1.   Starting base salary of $75,000/year. It will be adjusted to $80,000/year
     after completion of the three-month trial period.
2.   A stock option grant of 75,000 shares, after completion of the above
     mentioned three-month trial period and subject to the approval of the board
     of directors, with 15,000 shares vest immediately on the date of grant and
     the rest to be vest in four equal installments at 15,000 shares on each of
     your employment anniversary date for the next four years.
3.   Eligible to participate in a number of Company sponsored benefits including
     two weeks paid vacation, one week sick leave and one week bereavement leave
     based on actual needs, all in accordance with the Company's policies as in
     effect from time to time. In addition, you will be covered under Company
     paid health insurance program including major medical, dental and vision
     care, group life insurance of $15,000 and long term disability. You will
     also be eligible to participate in the 401(k) plan after one-year service.
4.   You will be reporting to the Vice President of Finance and Administration.

You are expected to execute the company standard forms of Assignment of Rights
(for new inventions and work products), Confidentiality and Non-Disclosure
Agreements as shall be provided to you by the Company upon your reporting to
work.

We feel strongly that you will be an asset to the company and can contribute to
the growth of Electronic Sensor Technology as a team player.

                                                             Sincerely,

                                                             /s/ Teong C. Lim
                                                             -------------------
                                                             Teong C. Lim, Ph.D.
                                                             President and CEO

Accepted and Agreed to the Offer
And will report to duty on _____________

/s/ Philip Yee    Dated 3/16/06exv10w4

 

EXHIBIT 10.4

Schedule Number 1 to Master License Agreement Number: AEFA-10/4/99-KF-1

This Schedule is issued pursuant to a License Agreement (the “Agreement”) between
American Express Travel Related Services Company, Inc. (“Amexco”) and the Licensor specified
below, entered into on October 15, 1999 which Agreement shall be amended by this Schedule No. 1.
In accordance with the provisions of the said Agreement and the provisions of this Schedule,
Licensor will provide Licensee with the Products (as described in the Statement of Work, attached
to the Master Agreement for Consulting Services, dated June 3, 2005) in the number of copies and
at the Installation Site(s) specified below. If any provision of the Agreement or a prior schedule
contradicts any provision of this Schedule, the provisions of this Schedule shall apply with
respect to the Products licensed pursuant to this Schedule.

Copies
of Products; Installation Sites

Licensor shall provide Amexco: (i) one copy of the Products for planning/testing in the testing
environment (E1); (ii) one copy of the Products for planning/testing in the development
environment (E2); (iii) one copy of the Products for planning/testing in the production system
(E3); and, (iv) one copy of the Products, guaranteed, and as many additional copies of the
Products as Amexco may request, and Licensor consent to (such consent not to be unreasonably
withheld), for the purposes of planning/testing of Business Continuity Planning and Disaster
Recovery (“BCP/DR”). Licensor shall provide planning/testing of E1, E2 and E3 as part of its
regular maintenance servicing of the Products and without additional charge to Amexco; however,
any planning/testing of BCP/DR performed by Licensor shall not be deemed to be part of its regular
maintenance servicing of the Products and Licensor shall have the right to charge Amexco for such
planning/testing at a rate to be mutually agreed upon by the parties. The aforementioned copies of
the Products may be installed at any location (“Installation Site”) operated by Licensee, wholly
owned subsidiary of Licensee and/or any Licensee outsourced partner, provided such outsourcer
first executes a third party access agreement acceptable to Licensor.

Scheduled Delivery Date

The Products will be delivered by August 12, 2005.

Products

All Products are licensed for use by any Licensee, wholly owned subsidiary of Licensee and/or
outsourced Licensee partner location during the term of the license granted herein. The Warranty
Period shall extend until Amexco’s acceptance of the Products, pursuant to Article 3 of the
Agreement.

Amendments to the Agreement

Section 5.3 of the Agreement shall be amended hereinafter to delete from the second line the
phrase “affiliates, joint ventures or other parties” and replace it with “and affiliates”.

Section 7.1 of the Agreement shall be amended hereinafter to add the following: “Amexco agrees to
provide USD with reasonable remote access so as to permit USD to correct and repair the Products
as contemplated in this Article 7.”

The first line of Section 9.3 of the Agreement shall be amended hereinafter to replace “USDA’s”
with “USD’s”.

Designated Computer

Any computer(s) owned by or leased to Licensee, wholly owned subsidiary of Licensee and/or
outsourced Licensee partner location executing a version of an operating system that is generally
supported by Licensor for the applicable Product(s) licensed herein.

Schedule Number 1 to Master License
Agreement Number: AEFA-10/4/99-KF-1

Page 1 of 7

 

Schedule Number 1 to Master License Agreement Number: AEFA-10/4/99-KF-1

	 	 	 
	Licensor:

	 	US Dataworks, Inc.
	 
	 	 
	Licensee:

	 	American Express Inc.
	 
	 	 
	License Term:

	 	Ten (10) year term
	 
	 	 
	License Type:

	 	Full-use Term License
	 
	 	 
	Installation:

	 	Amexco, or its designee, and Licensor shall mutually install the Products.
	 
	 	 
	Acceptance Testing:

	 	For purposes of Section 3.1 of the Agreement, acceptance
testing shall be deemed to commence upon the initiation of the testing of the Products at E3.
	 
	 	 
	Authorization Codes:

	 	With the exception of Licensor’s CPU verification and
expiration date routines, Licensor warrants that it has
taken reasonable precautions to prevent the introduction
into the Products of any “viruses,” “time bombs,”
“trojan horses,” and other intentionally disabling
devices (hereinafter “Disabling Devices”) and that to
the best of Licensor’s knowledge, the Products are free
of Disabling Devices.
	 
	 	 
	License Fees:
	 	 

	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 	 	Capture	 	 	 	 	 	 	 	 
	 	 	Controller	 	Payments	 	Clearingworks	 	Returns	 	Total
	Final & Firm Price
	 	$	425,000	 	 	$	680,000	 	 	$	595,000	 	 	$	680,000	 	 	$	2,380,000	 

License Fee Payment Schedule:

The License Fee for the Products shall be payable to Licensor according to the following schedule:
(i) twenty-five percent (25%) of the total License Fee upon execution of this Schedule; (ii) thirty
percent (30%) of each Product’s License Fee upon Licensor’s installation of such Product at the
Installation Site; (iii) thirty percent (30%) of each Product’s License Fee upon Amexco’s
acceptance of such Product (pursuant to Article 3 of the Agreement); and, (iv) the remaining
fifteen percent (15%) of each Product’s License Fee upon the earlier to occur: (a) thirty (30)
calendar days following Amexco’s acceptance of such Product, (b) one (1) calendar day following
actual production being run on such Product, or, (c) March 31, 2006.

License
Rejection; Reimbursement:

At any time prior to the ninetieth (90th) calendar day following the Production Date (as
such term is defined herein), Amexco shall have the right to reject the Products and receive from
Licensor a full reimbursement of any License Fees actually paid to Licensor; provided, that Amexco
can

Schedule Number 1 to Master License Agreement Number: AEFA-10/4/99-KF-1

Page 2 of 7

 

Schedule Number 1 to Master License Agreement Number: AEFA-10/4/99-KF-1

describe, in writing and in reasonable detail: (i) how the Products substantially failed to
perform/comply with the Specifications, Documentation and any other criteria and procedures
mutually agreed upon and set forth in the Statement of Work, attached to the Master Agreement for
Consulting Services, dated June 3, 2005 (such writing hereinafter a “Rejection Notice”), and, (ii)
how Licensor, upon receipt of the Rejection Notice and being given a reasonable period of time to
cure thereafter (but in no instance less than 90 days following the following actual production
being run on the Product), has failed to get the Products to perform/comply with the
Specifications, Documentation and the Statement of Work and that Licensor’s continued efforts,
over a reasonable period of time, would nonetheless be inadequate to cure to the satisfaction of
Amexco. For the purpose of this section, “Production Date” shall mean: (i) for both the
Clearingworks (ARC and Check 21) and the Returns (auto-return check) functionalities, that date
upon which the first production transaction is actually processed electronically (expected to be
via (FAS)); and, (ii) for both the Capture
Controller and Payments functionalities, that date upon
which the first production lock box transaction is actually processed.

Upon Amexco’s rejection of the Products and request for reimbursement, Licensor shall promptly
reimburse, without interest, all License Fees received from Amexco. Amexco shall promptly return
all Software and Documentation to Licensor, including, but not limited to, all discs, tapes,
documentation or other physical embodiments of the Software and Documentation, and shall certify
to Licensor that it has not retained any copies of the Software and that it acknowledges that it
may no longer use the Software or Documentation. Amexco may only reject all of the Products, as a
whole; it may not reject part of the Products and continue to license any other part of the
Products, unless otherwise agreed by the parties.

Maintenance Fees:

Maintenance Fees shall be invoiced annually, in advance, upon Amexco’s acceptance of the
Products pursuant to Article 3 of the Agreement and on each one-year anniversary thereafter.

Maintenance (24x7 Coverage):

	 	 	 	 	 
	Year 1
	 	$	476,000	 
	Year 2
	 	 	423,640	 
	Year 3
	 	 	377,040	 
	Year 4
	 	 	335,565	 
	Year 5
	 	 	318,787	 
	Year 6
	 	 	302,848	 
	Year 7
	 	 	302,848	 
	Year 8
	 	 	302,848	 
	Year 9
	 	 	302,848	 
	Year 10
	 	 	302,848	 

Schedule Number 1 to Master License Agreement Number: AEFA-10/4/99-KF-1

Page 3 of 7

 

Schedule Number 1 to Master License Agreement Number: AEFA-10/4/99-KF-1

Third Party Software Pass-through:

Amexco acknowledges that certain third party software solutions, specifically identified in
Attachment 1 (“Third Party Software”), are integral to the functionality of the Products,
though the license fees of such Third Party Software are not included in the License Fee,
Maintenance Fee or Professional Services Fee. For avoidance of doubt, the parties acknowledge and
agree that Amexco shall purchase the Third Party Software directly from the corresponding vendor
and Amexco shall be solely responsible for the payment of all license fees directly to the
corresponding vendor.

This Schedule is subject to the following special provisions:

	1.	 	Licensee hereby agrees that the Product licensed herein shall only be used for Licensee’s
internal operations for processing its own or its
customers’ data. Under no circumstance shall Licensee reverse compile, reverse assemble or
otherwise reverse engineer such Products.
Licensee may only grant access to the Products licensed pursuant to this Schedule to an
employee(s) of American Express Inc. and/or a
wholly owned subsidiary of American Express, Inc. (“Related Employee”) provided such Related
Employee(s) has first executed an
agreement that commits such Related Employee(s) to conduct that would not violate Licensee’s
obligations pursuant to the Agreement
and this Schedule.
	 
	2.	 	The products referenced in this Schedule shall be placed into Escrow per the terms of Article 6
of the Agreement.

	 	 	 
	Licensor:

	 	Licensee:
	US DATAWORKS, INC.

	 	AMERICAN EXPRESS INC.
	 
	 	 
	/s/ Terry E. Stepanik

	 	/s/ Kevin Park
	 

	 	 
	Signature

	 	Signature
	 
	 	 
	Terry E. Stepanik

	 	Kevin Park
	Name

	 	Name
	 
	 	 
	President & COO

	 	Director, Global Procurement
	Title

	 	Title
	 
	 	 
	7/6/05

	 	7/22/05
	Date

	 	Date

Schedule Number 1 to Master License Agreement Number: AEFA-10/4/99-KF-1

Page 4 of 7

 

 

Schedule Number 1 to Master License Agreement Number: AEFA-10/4/99-KF-1

EXHIBIT A

DELIVERABLE ENCRYPTION INFORMATION

Encryption Information

Identify each hardware and software component of each of the Products having encryption
capability by its respective unbundled part number and level of encryption. 

	 	 	 	 	 	 	 
	 	 	 	 	Level of Encryption (e.g	 	Type (e.g. DES, Blowfish
	Product Component(s)	 	Unbundled Part Number	 	40 bit, 56 bit, 128 bit etc.)	 	RC2, CAST etc.)
	 
	 

	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 

Schedule Number 1 to Master License
Agreement Number: AEFA-10/4/99-KF-1

Page 5 of 7

 

 

Schedule Number 1 to Master License Agreement Number: AEFA-10/4/99-KF-1

Export License Information

Indicate in connection with
each part number for each component the Commodity
Classification or Export License or License Exception granted — for example, “Mass Market License
Exception, TSU” Or “License Exception, ENC” by the US Department of Commerce, Bureau of Export
Administration, providing in each case the Export Control Classification Number (and Paragraph,
if applicable), — and the date of the US DOC/BXA finding in each case.

	 	 	 	 	 	 	 	 	 	 	 	 	 
	 	 	 	 	Export Control	 	 	 	Did you	 	Did you Receive a License	 	 
	 	 	 	 	Classification Number	 	Did you Receive	 	Receive an	 	Exception ENC? Provide	 	 
	Product	 	Unbundled	 	Card Paragraph, If	 	a Commodity	 	Export	 	Applicable Regulation e.g., 15	 	USDOC/BXA
	Component(s)	 	Part Number	 	Applicable	 	Classification?	 	License?	 	CFR 742.15(b)(4)	 	Date of Finding
	 
	 

	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 

Licensor’s Contact

Identify Licensor’s export manager or contact responsible for filing or obtaining the
export licenses or license exceptions for the Products.

	 	 	 	 	 	 
	 	 	 	 	 	 
	 	Name:
	 	 	 	 
	 	 	 	 	 	 
	 	Address
	 	 	 	 
	 	 
	 	 	 	 
	 	 	 	 	 	 
	 	Telephone Number:
	 	 	 	 
	 	 	 	 	 	 
	 	Email Address:
	 	 	 	 
	 	 	 	 	 	 

Schedule Number 1 to Master License Agreement Number: AEFA-10/4/99-KF-1

Page 6 of 7

 

 

Schedule Number 1 to Master License Agreement Number: AEFA-10/4/99-KF-1

Import License Information

Indicate in connection with each part number for each component whether any import license
was applied for, granted or rejected, the name of the country granting the license, and whether or not the license extends to
Licensor’s customers.

	 	 	 	 	 	 	 	 	 	 	 	 	 
	Product	 	 	 	Import License	 	Import License	 	 	 	Indicate if License to	 	 
	Compon	 	Unbundled	 	Date Applied	 	Granted or	 	License Number	 	Import Extends to	 	Country Granting
	ent(s)	 	Part Number	 	For	 	Rejected	 	Indicated	 	SAP’s Customer?	 	Import License
	 
	 

	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 
	 

	 	 
	 	 
	 	 
	 	 
	 	 
	 	 
	 

Identify your Company’s Web Site, if any, where information can be found relating to the
technical specifications and export or import of the Products.

	 	 	 	 	 	 
	 	 	 	 	 	 
	 	Name:
	 	 	 	 
	 	 	 	 	 	 
	 	Address:
	 	 	 	 
	 	 
	 	 	 	 
	 	 	 	 	 	 
	 	Telephone Number:
	 	 	 	 
	 	 	 	 	 	 
	 	Email Address:
	 	 	 	 
	 	 	 	 	 	 

Schedule Number 1 to Master License Agreement Number: AEFA-10/4/99-KF-1

Page 7 of 7

 

 

Attachment 1

Third Party Software

Crystal Reports MS SQL Server

IBM UDB

IBM MQ Series

IBM Websphere (or Tomcat or BEA Weblogic)

A2iA CheckReader

Thomson EPICWare & Thomson Bank File

SftTree (UDW supplied at no cost)

View/Director ActiveX controls (UDW supplied at no cost)

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