SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* CHIAPPETTA MICHAEL (Last) (First) (Middle) 200 SMITH RANCH ROAD (Street) SAN RAFAEL CA 94903 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol FAIR ISAAC CORP [ FIC ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) Vice President
	3. Date of Earliest Transaction (Month/Day/Year) 02/19/2004
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/19/2004		M		1,458	A	$11.73	4,391	D
Common Stock	02/19/2004		M		1,946	A	$12.01	6,337	D
Common Stock	02/19/2004		M		3,891	A	$10.04	10,228	D
Common Stock	02/19/2004		M		6,020	A	$7.5	16,248	D
Common Stock	02/19/2004		M		1,054	A	$20.64	17,302	D
Common Stock	02/19/2004		M		14,269	A	$34.87	31,571	D
Common Stock	02/19/2004		M		12,695	A	$27.21	44,266	D
Common Stock	02/19/2004		S		2,601	D	$59.9489	41,665	D
Common Stock	02/19/2004		S		23,900	D	$60	17,765	D
Common Stock	02/19/2004		S		1,054	D	$60.13	16,711	D
Common Stock	02/19/2004		S		278	D	$60.15	16,433	D
Common Stock	02/19/2004		S		185	D	$60.16	16,248	D
Common Stock	02/19/2004		S		6,020	D	$60.287	10,228	D
Common Stock	02/19/2004		S		1,464	D	$61.0078	8,764	D
Common Stock	02/19/2004		S		2,427	D	$61.1142	6,337	D
Common Stock	02/19/2004		S		1,946	D	$61.2328	4,391	D
Common Stock	02/19/2004		S		213	D	$61.27	4,178	D
Common Stock	02/19/2004		S		1,245	D	$61.2819	2,933	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Incentive Stock Option (right to buy)	$11.73	02/19/2004		M			1,245	08/05/2002(1)	01/24/2007	Common Stock	1,245	$0	0	D
Non-Qualified Stock Option (right to buy)	$11.73	02/19/2004		M			213	08/05/2002(1)	01/24/2007	Common Stock	213	$0	0	D
Non-Qualified Stock Option (right to buy)	$12.01	02/19/2004		M			1,946	08/05/2002(1)	02/23/2008	Common Stock	1,946	$0	0	D
Incentive Stock Option (right to buy)	$10.04	02/19/2004		M			2,427	08/05/2002(1)	01/28/2009	Common Stock	2,427	$0	0	D
Non-Qualified Stock Option (right to buy)	$10.04	02/19/2004		M			1,464	08/05/2002(1)	01/28/2009	Common Stock	1,464	$0	0	D
Non-Qualified Stock Option (right to buy)	$7.5	02/19/2004		M			6,020	08/05/2002(1)	04/12/2009	Common Stock	6,020	$0	0	D
Non-Qualified Stock Option (right to buy)	$20.64	02/19/2004		M			1,054	08/05/2002(1)	10/01/2006	Common Stock	1,054	$0	0	D
Incentive Stock Option (right to buy)	$34.87	02/19/2004		M			278	08/05/2002(1)	02/11/2007	Common Stock	278	$0	0	D
Non-Qualified Stock Option (right to buy)	$34.87	02/19/2004		M			6,207	08/05/2002(1)	02/11/2007	Common Stock	6,207	$0	0	D
Non-Qualified Stock Option (right to buy)	$34.87	02/19/2004		M			7,784	08/05/2002(1)	10/02/2007	Common Stock	7,784	$0	0	D
Non-Qualified Stock Option (right to buy)	$27.21	02/19/2004		M			10,094	08/05/2002(1)	02/27/2009	Common Stock	10,094	$0	2,407	D
Incentive Stock Option (right to buy)	$27.21	02/19/2004		M			2,601	08/05/2002(1)	02/27/2009	Common Stock	2,601	$0	0	D

Explanation of Responses:

1. All options were fully vested by August 5, 2002.

Remarks:

	Michael Chiappetta	02/19/2004
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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