I'm looking at an envelope that's ready to be returned. There is nothing written on it that says private use or any other warning.

They mailed it to me and I'm simply mailing it back to them.

If I receive junk mail and there is a postage prepaid return envelope, you better bet that they are getting it returned to them.

However, I do remove any reference to my name and address and any bar-codes that could me traced to me.( O.K. I may be a little paranoid )

I'm just doing my civic duty in attempting to aide the U.S. Postal service.