In reply to So if you bought with Prima by Penny
I just saw today that just paying the IMU is not enough but we have to do an 'Imposta Municipale Propria - Dichiarazione per l'anno 2012'. Which is a declaration of your interest in the property.The deadline at the moment is 1st Jan 2013 but I believe this may be put back to 1st February 2013. It seems that you only need to complete it of the house is not your main residence or meets some other requirements that result in you getting a reduction in the IMU. There are full instructions here: instructions and the form is here.