  In the last few years we have started a systematic study aimed at detecting
very young Planetary Nebulae (YPNs). The project, based on both radio
(multi-frequency and high resolution) and optical observations, has already
provided interesting results, including the identification of new YPNs and the
observation, for the first time in PN in this very early phase of their
formation, of radio bipolar morphologies.
  In this paper we present radio and optical results on one of our targets,
namely IRAS 19590-1249 (LS IV -12 111). The analysis of spectroscopic
observations, obtained with the Anglo Australian Telescope (AAT) in different
epochs, has allowed us to conclude that the optical spectrum of this object has
evolved quite rapidly, showing, very recently, strong forbidden nebular
emission lines consistent with a young PN. This result confirms that IRAS
19590-1249, has turned into a PN within the last decades and makes this source
a perfect target for studying the early evolution and structure of Planetary
Nebulae.
