In Catholicism it is against Church teaching for anyone, even the repentant, to write down ones’ sins.
The idea is that once Jesus forgives the sin it is forgiven. Reparations and penance are a matter to be handled after, but continued guilt and obsession- scrupulosity.
This is a horrible story, well written, I suppose, but, wow.
Not true. The penitent is not bound by the Seal of Confession. The priest and anyone who overhears the confession are bound.
I don’t believe that was true during the Inquisition.