The top quark, the heaviest known elementary particle, is unique in many respects. For instance, in addition to having the strongest Yukawa coupling to the Higgs boson, it decays before hadronizing unlike all other quarks. This allows us to study its properties directly. Two such properties are the charge-parity (CP) violation, intimately connected to matter-antimatter asymmetry, and flavour changing neutral current (FCNC), which is forbidden at tree level in the standard model but can occur at higher orders. We discuss results on recent studies performed by the ATLAS and CMS experiments at the LHC on CP violation and FCNC transitions related to the top quark.