@sblom got it right, the site solves both problems. The congress person will know you are a constituent based upon the home address you provide. (it will be on

@sblom got it right, the site solves both problems. The congress person will know you are a constituent based upon the home address you provide. (it will be on the outside of the letter as the return address but also on the inside under your name identifying you as a constituent) However, the same problem exists with regular mail. If somebody wanted to provide a bogus home address they could. There is no real way for us to validate you are who you say you are. And there will be some people that have a different billing address and name information on their credit cards than their home address so I didn't want to validate based upon that.