If you plan to mail fundraising solicitations to people outside of your network or your project’s network, the city of Los Angeles requires that you obtain a solicitation permit or "information card." A copy of the information card must accompany any major direct mail solicitation you send to the general public. You can find the instructions for obtaining the permit here.
Once you have the permit and the your fundraising letter ready to go, you may be interested in exploring nonprofit bulk mailing rates through Community Partners, as we're registered with the United States Postal Service. It is important to keep in mind that the process for using the bulk mailing rates is very time intensive and requires several visits to the post office, an annual mailing fee, and an immense amount of time to organize the pieces of mail according to the post office guidelines (sorted by zip code). Community Partners recommends contacting a mailing house as the most cost-effective way to send bulk mail.