Pete, mistakes do happen, especially if you are sending out different cuttings to different people. You have to be highly organized, and most of us aren't! The PM's can get so mixed up and your box gets full, and you might accidentally delete the one you really wanted.
Even the way I did it this year with just one variety, it was still easy to get mixed up. I tried to copy and paste every name and address on a word doc. Then I copied those onto address labels. Even then, I had to print out the list and check each one off against the packages because I ended up with one extra package, and no label. I was happy for the check off list because I found the error, but I can see how you could get mixed up for sure!
Suzi