  Charm physics has played all along a central role in particle physics,
however the level of attention on it has tremendously increased in the last
years because of the observation of "fast" $D^0-\bar{D}^0$ flavour oscillations
and because of very recent observed hints of CP violation. While in the past
these would have been unambiguously interpreted as signs of New Physics, the
revisitation of theoretical expectations, prompted by the latest experimental
measurements, makes the picture not clear. This brief review covers the current
status of CP-violating measurements in the $D^0-\bar{D}^0$ system, both on the
experimental and theoretical side.
