Here are a couple of adresses that you can send fan mail to Rosario at. I have not tested these addresses and I do not know if they will even reach her. But if you like to give it a try, feel free to use the addresses below. Remember to send a self-addressed, posted paid envelope if you are requesting an autograph/reply!

Rosario Dawson
1635 N Cahuenga Blvd
#500
Los Angeles, CA 90028
USA

Rosario Dawson
c/o ML Management Assocs Inc
125 W. 55th Street, 8th Floor
New York, NY 10019
USA