The Spanish participating broadcaster, Televisión Española (TVE), selected its performer through the competition Pasaporte a Dublín and, subsequently, the song internally once the national final was over.

Televisión Española (TVE) decided in 1970 to produce a musical series in which some of the most popular singers in Spain would compete to go to Eurovision.

TVE prepared a shortlist of twenty artists that were important at the time for their popularity, sales or quality; some of them refused to participate because of scheduling conflicts or other reasons, among them Marisol, Juan Pardo, Miguel Ríos, and Víctor Manuel.

Magazines Semana and Teleprograma published that Jaime Morey, who would be internally selected to represent Spain at Eurovision the following year, came in second place, while Dova was third.

[1][2] Despite the popularity of the program, the format of Pasaporte a Dublín was not used again by TVE to choose the Spanish entrant; in fact a national final was not organized again until 1976.