CMP Credit Card Validation Amanuensis

CMP home Amanuenses Menu no menu Last updated 2004-06-28 by Roedy Green ©1996-2004 Canadian Mind Products

This Applet will help you tell if a credit card number is valid. It will also tell you which of the following credit card companies issued the card: Amex, Diners Club, Carte Blanche, Discover, enRoute, JCB, MasterCard or Visa.

It validates the prefix and the checkdigit. It does not contact the credit card company to ensure that number has actually been issued and that the account is in good standing.

The Applet is designed for cannibalising so that you can steal the code you need from it to include in your own programs.

The amanuensis is also available with Java source to download. You can optionally run Credit Card Validation Amanuensis as an application by invoking the com.mindprod.creditcard.CreditCardValidate class.

On the Internet, approximately 70% of transactions are Visa, 27% are Mastercard and 3% are American Express.

This Applet requires one of the following up-to-date browsers:

Opera Opera 7.5 with the Java 1.4.2_04 Plug-in
Mozilla Mozilla 1.6 with the Java 1.4.2_04 Plug-in
Netscape Netscape 7.1 with the Java 1.4.2_04 Plug-in
IE Microsoft Internet Explorer 6.0.2800 with the Java 1.4.2_04 Plug-in
Get Java Sun's Java 1.4.2_04 Plug-in add on
Click the corresponding browser icon to download the latest browser software

No information will be sent over the web, either to CMP or to the credit card companies. You can verify this by looking at the source code.


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You can get a fresh copy of this page from: or possibly from your local J: drive mirror:
http://mindprod.com/creditcard.html J:\mindprod\creditcard.html