  Flavour-violating axions appear in models where the Peccei-Quinn(PQ) charges
are generation non-universal. Consequently, this charge arrangement will also
generate flavour violation in the UV sector. The typical way of implementing
such an axion in a UV completion is with a DFSZ model, containing 2 Higgs
doublets. In this talk we will present how to parameterize the flavour
violation in the UV such that we can find a direct correlation with the flavour
violation of the axion. Finally, we show in an example how this connection can
help in giving information about the UV completion if an axion is found in a
flavour-violating channel.
