The call is directed to practising lawyers, researchers, law students, in fact anyone with interest in law. You can contribute anonymously or you can indicate your name and professional affiliation.
All types of contributions are welcome. Ideally the structure specified in How to contribute? should be followed, as this would facilitate any type of search by CaseLawPedia users. However, providing any information would be equally sufficient. Even if you feel that there is a judgment out there that should be translated or analysed but you do not have enough time to do so, just download a reference or the text (remember about copyright!). Maybe someone else will have the time and interest to continue your work.
Last but not least, the contributors should not feel restricted to their own jurisdiction. On the contrary, presenting judgments from other jurisdictions and looking at them through the eyes of an outsider might be equally valuable.