First off.... *NEVER* send cash throught the mails.

If you order beans from a seed bank, order online with a disposable VISA card, then have them delivered to a PO Box. In the online form there is a box for comments... put the words "Discreet shipping please".
I have *NEVER* had a problem with this method when ordering from Rhino Seeds or Cannibis Seeds, and have been dealing with them for a couple of years.