having worked in frt for going on 30 years i have learned a few things about shipping stuff out
1. name and address on envelop/box with tape over it, another address label INSIDE THE PACKAGE
2 anything fabric goes in plastic.. when i mail stuff out in a big box, first thing in the box is an open heavy duty trash bag... fill the box, close & tape the bag..put the extra address label in , then close & tape the box... you only control what you put in your box to ship, not what the guy who's box is next to yours is shipping... could be bleach.. could be anything
3. my dm puts the addressee's address as both mailing & return.. so either way it gets where she wants it to go.
4. make sure you let whomever is getting a package know when you mailed it and the expected due date..
5 always get delivery confirmation