  We shortly present two small results regarding the study formal duality in
finite abelian groups as introduced by Cohn, Kumar, Reiher and Sch\"urmann. In
particular, we give a new example of a formally self dual set in
$\mathbb{Z}_2^2\times\mathbb{Z}_4^2$ and computed nonexistence of primitive
formally dual sets of size $8$ in $\mathbb{Z}_8^2$.
