Hi everybody! Excuse my english and I hope you will understand my question: My problem is with 2 or more layers cake. Is there anything we have to put between layers in order to avoid fondant to get wet and sticky ? It does not look very good when we want to cut the cake layer by layer ... do we have to put a cardboard or something?

I hope anybody has suggestions for me!!

Thank you so much!!

The fondant shouldn't be wet and sticky. If you are referring to fondant (or icing) sticking to the board of the tier above, you can use a circle of waxed paper/parchment paper, or sprinkle with powdered sugar. The only thing you need between the layers is icing (or filling).

Layer cakes aren't cut layer by layer, they are cut as an entire two-layer cake (typically, two 2" tall layers). When layer cakes are stacked, each layer cake is called a tier, and each layer cake (or tier) is on its own board.

You'll need a support system for every 4" of cake height. Here is more information about stacked construction:
http://www.wilton.com/cakes/tiered-cakes/stacked-tiered-cake-construction.cfm