Article 48 of the Costa Rican Constitution provides for the remedy of amparo in order to maintain or re-establish the enjoyment of rights set out in the Constitution, as well as those of a fundamental nature established in international human rights treaties enforceable in Costa Rica. The amparo cause of action has been construed very broadly, to allow any person to file a case regarding a constitutional right without a lawyer, with no filing fees, in any language, at any time, on any day of the year and in any form, including handwritten notes. Furthermore, in 1994, the Constitutional Chamber broadened the notion of legal standing further by establishing the principle of intereses difusos, whereby individuals are allowed to bring actions on behalf of the public interest, including in the interest of environmental protection. Amparo and intereses difusos have enabled the people of Costa Rica to have easy access to the justice through the Constitutional Chamber, and they have responded. In 2012 alone, the Constitutional Chamber received 14,953 amparo petitions; it has received 68,537 petitions since 1989.
See Report of Independent Expert on Mission to Costa Rica for an overview of the amparo cause of action: http://www.ohchr.org/EN/Issues/Environment/SREnvironment/Pages/Countryvisits.aspx ; and the web page of the Court for statistics on amparo actions: http://sitios.poder-judicial.go.cr/salaconstitucional/estadisticas.htm.