According to the Spanish electoral law a grouping of electors (Spanish: agrupación de electores) is a group of citizens temporarily associated with the goal of presenting a candidature to a particular election. It is a format that a candidature can use to present to a given election. To present the candidature, a candidate must present a minimum number of signatures relative to the electoral census. Given its temporary nature, if the promoters wanted to use the grouping for another election, the latter must be re-constituted. Unlike political parties, party federations or electoral coalitions, a grouping of electors cannot profit from public electoral funding from a preceding candidature.
For a group of electors to compete in a given general election, they must present a minimum number of signatures, amounting to the 1% of the electors in the electoral district (which correspond to each province and Ceuta and Melilla).
For a group of electors to compete in a given election to the European Parliament, they must present a minimum of 15,000 signatures.