Would you need any letter from the Bolivian Embassy assuring you of getting this visa upon arrival?
Jun 23, 2011
Bolivia visa for citizens of Cameroon by: Anonymous
According to the Ministerio de Relaciones Exteriores (Ministry of Foreign Affairs) website, citizens of Cameroon (Camerún) do need a tourist visa, but don't have to get it prior to arrival. This means you'd probably be given the visa upon arrival at the border or airport.