i found this on the net, like iv said before i dont trust the net, but hey you never know. good luck huni.
Shannen Doherty
John Carrabino Management
5900 Wilshire Boulevard
4th Floor
Suite 406
Los Angeles, CA 90036
USA
Shannen Doherty
Agency for the Performing Arts L.A.
405 S Beverly Drive
Beverly Hills, CA 90212-4425
USA
How to send your fan mail and autograph requests to Shannen Doherty?:
If you want to request an autograph, follow the guidelines bellow. If you live in USA send a properly stamped and self addressed envelope (minimum size 8.5" x 4") with your request letter and a photo. You can include a piece of cardboard to keep the photo from bending in shipping and also add "Do Not Bend" on the envelopes. Send your letter and wait. On average, there is going to be a 3+ month wait for a response. If you do not live in USA, add several* International Reply Coupons. The International Reply Coupons (IRC) will be used by the receiver to purchase american stamps. You can only get them at your post office. Place the IRCs into the envelope, not on it.