-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 OaGgApogRpwt62vN5HcnFuJyHLRgyw6kSP5KI5U2SEHxAuTd3LxiHTAVcBXxmYT8
 MyzpP7YOcG5ZhHDCfio7HQ==

<SEC-DOCUMENT>0001209191-03-018069.txt : 20030820
<SEC-HEADER>0001209191-03-018069.hdr.sgml : 20030820
<ACCEPTANCE-DATETIME>20030820154735
ACCESSION NUMBER:		0001209191-03-018069
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030819
FILED AS OF DATE:		20030820

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ELLERTSON JAIME WALLACE
		CENTRAL INDEX KEY:			0001215063

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-24931
		FILM NUMBER:		03858159

	MAIL ADDRESS:	
		STREET 1:		C/O SI CORP
		STREET 2:		3500 LENOX ROAD SUITE 200
		CITY:			ATLANTA
		STATE:			GA
		ZIP:			30326

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			S1 CORP /DE/
		CENTRAL INDEX KEY:			0001063254
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROGRAMMING, DATA PROCESSING, ETC. [7370]
		IRS NUMBER:				582395199
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		3390 PEACHTREE ROAD NE
		STREET 2:		SUITE 1700
		CITY:			ATLANTA
		STATE:			GA
		ZIP:			30326
		BUSINESS PHONE:		4048126200

	MAIL ADDRESS:	
		STREET 1:		3390 PEACHTREE ROAD NE
		STREET 2:		SUITE 1700
		CITY:			ATLANTA
		STATE:			GA
		ZIP:			30326

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SECURITY FIRST TECHNOLOGIES CORP
		DATE OF NAME CHANGE:	19980603
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-08-19</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0001063254</issuerCik><issuerName>S1 CORP /DE/</issuerName>        <issuerTradingSymbol>SONE</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001215063</rptOwnerCik><rptOwnerName>ELLERTSON JAIME WALLACE</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>C/O S1 CORPORATION</rptOwnerStreet1><rptOwnerStreet2>3500 LENOX ROAD</rptOwnerStreet2><rptOwnerCity>ATLANTA</rptOwnerCity><rptOwnerState>GA</rptOwnerState><rptOwnerZipCode>30326</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>1</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>CEO</officerTitle></reportingOwnerRelationship></reportingOwner><nonDeriva
tiveTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-08-19</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>P</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>6235</value></transactionShares><transactionPricePerShare><value>4.18</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>0</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-08-19</value><
/transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>P</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>3765</value></transactionShares><transactionPricePerShare><value>4.19</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>0</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-08-19</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>P</transactionCode><equitySwapInvolved>0
</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>5000</value></transactionShares><transactionPricePerShare><value>4.2</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>0</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction><nonDerivativeHolding><securityTitle><value>Common Stock</value></securityTitle><postTransactionAmounts><sharesOwnedFollowingTransaction><value>158525</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeHolding></nonDerivativeTable><footnotes></footnotes><remarks></r
emarks><ownerSignature><signatureName>Richard Dobb, Esq. as Attorney-in-Fact</signatureName><signatureDate>2003-08-20</signatureDate></ownerSignature></ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----