Last month US Heartland Payment Systems disclosed a data breach which could affect over 100 million cards (Computerworld story).

Computerworld is now reporting that US banks and credit unions have begun to reissue thousands of credit and debit cards .

Several have also begun disclosing fraud associated with payment cards that were reported to them by Visa and MasterCard as having been exposed in the breach.

Do you have a procedure in place to notify your customers if a data breach affects your card processor?