See, for example, either of:
http://windowssecrets.com/forums/sho...l=1#post734296
http://www.techsupportforum.com/foru...ml#post2567119
(same workbook in both). For what you're trying to do it would be best to keep the checkboxes on the master sheet. That way, things won't get out of synch on the recipient sheets if the master sheet gets re-arranged.
An alternative would be to ditch the recipient sheets and use a Word mailmerge to list the items by recipient.