Would you like to write Bella a letter, telling her what a great actress she is? Or would you like to request an autograph? This is the address that you can send Bella a letter to.
For Autograph requests: You will need to send a SASE (Self Addressed Stamped Envelope) and Bella will be more than happy to send you an autograph =)

Address:
Los Angeles, CA:
8060 Melrose Ave
4th Floor
Los Angeles, CA 90046
USA

If you only have a little thing to say to her, you can always write her a Twitter message; www.twitter.com/bellathorne143