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https://issues.apache.org/jira/browse/OFBIZ-7824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15645786#comment-15645786
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Paul Foxworthy commented on OFBIZ-7824:
---------------------------------------

Some credit cards have different lengths. For example, American Express is 15, 
not 16 digits.

Credit cards have a built-in checksum using the Luhn algorithm 
(https://en.wikipedia.org/wiki/Luhn_algorithm). It would be far better to 
verify the checksum, rather than just the number of digits.

There already is credit card checksum checking in OFBiz.  Have a look at 
https://fisheye6.atlassian.com/browse/~br=trunk/ofbiz/trunk/framework/base/src/main/java/org/apache/ofbiz/base/util/UtilValidate.java?r=1761200#to1193
 and the preceding code.

Is there somewhere in OFBiz that should be using this validation, but isn't 
currently?



> Add validation for credit card number length 
> ---------------------------------------------
>
>                 Key: OFBIZ-7824
>                 URL: https://issues.apache.org/jira/browse/OFBIZ-7824
>             Project: OFBiz
>          Issue Type: Improvement
>          Components: ALL APPLICATIONS
>    Affects Versions: Trunk
>            Reporter: Padmavati Rawat
>            Priority: Minor
>
> Ofbiz allows for any length for credit card numbers, as default length is 16 
> digits.



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