Andrea,

Add UPPER() to both sides of your comparison.  This should get you what you want.

IF(UPPER({{Telefono}}==UPPER({{$Model.Pratica.data.0.Azienda__r.Phone}}),"","!")

Thanks,

Bill

Thank you Bill!!

Very helpful, thanks Bill! It would be great for Skuid to add this to the function menu (Are there any Skuids Listening???)
-Disregard… I see it in there now, but it brings up another issue, I am unable to scroll to the bottom of the function menu with my mouse in Chrome. I had to use my touch screen to scroll past “Round”.