Bounds on Neutrino Non-Standard Interactions

We review the present model independent bounds on neutrino non-standard interactions both at neutrino production and detection and in its interactions with matter. For matter non-standard interactions the direct bounds are rather weak. However, matter non-standard interactions are related by gauge invariance to the production and detection ones as well as to flavour changing processes involving charged leptons. Taking into account these relations much stronger bounds of at least O(10(-2)) can be derived unless significant fine tunings are implemented. Testing non-standard interactions at this level at future neutrino oscillation facilities is challenging but still feasible at very ambitious proposals such as the Neutrino Factory.