CARDCHECK V2.2 INFORMATION

CardCheck is an application for Windows 95/98/NT that verifies credit card numbers to ensure they are genuine.

CardCheck supports:
Visa, MasterCard (Eurocard), Discover, American Express and Diners Club cards.


It performs three functions:


1. It checks the number of digits

Credit cards can have either 13, 14, 15 or 16 digits.  CardCheck ensures the right amount of numbers have been supplied for that card type.


2. It checks the leading digit

Each Credit card type has a unique leading digit (or digits).  CardCheck ensures the correct initial digit(s) for that card type.


3. It checks the validity of the numbers

All credit cards contain a checksum, which is used to ensure the numbers in the credit card are correct.  CardCheck calculates the appropriate checksum for the supplied number and compares it to the expected result to ensure the number structure is valid.


NOTE:  CardCheck is NOT foolproof.  However it will detect an erroneous card number in at least 90% of cases.  CardCheck also only checks the credit card number, it does not check whether it is assigned to the person who has used it or whether the user has sufficient credit.



INSTALLATION

1.  Run the file, setup.exe

2.  Follow the instructions.



For more information contact:

Xequte Software 
PO Box 11301, Manners Street 
Wellington, New Zealand
www.xequte.com
sales@xequte.com

