The Affairs Organizer Blog

When writing a check to make a payment on a credit card account, DO NOT put the complete account number on the ‘For’ line. Instead, just put the last four numbers. The credit card company knows the rest of the number, and anyone who might be handling your check as it passes through all the check processing channels won’t have access to it.

This tip was sent to me in an email that’s been circulated several times, so I’m afraid I don’t know who to credit.