CC Info appears on Error Notification

Here's a bad one (and dangerous),

An email was sent to me (as the IP postmaster) stating a clients
confirmation order could not be Delivered via email .

Not a problem. He probably typed his email address in wrong.

The problem is that his Credit Card and Expiration was on the
email as well!

I have disabled including Credit Card info in any Confirmation
Emails via the manuals instruction, and I know it works correctly.

How can I disable including CC info on Undeliverable address
error emails?

Thanks,

Clay