Abstract: Methods and systems for assembling databases in multiple-party proceedings. Class members or their agents can file claims online using a computer network connected to the database. The online connection may be provided as a web site accessible through the Internet. Users file claims by submitting Identifying Information and Claim Information, both of which may be validated in order to prevent fraudulent or otherwise invalid claims. Class members may be provided with reference strings prior to filing the claim. The users are prompted to submit the reference strings when filing the claims for purposes of administration and to verify the authenticity of the filing. The filed claims are stored in a database which may be accessible to parties in the class action.