You're both right...

...I would include a note "opened in error" or some such, or maybe "Dear Cyril, we still get an amount of correspondence most of which is junk mail and filed accordingly, however these seemed important; I apologise for opening them to make sure they were. Please do make sure your friends know where you now live. Love and deep sexual yearnings, Pix L Man."

Or something like that

Posted By: Old Man, Mar 30, 22:44:31