Thanks for the replies! Based on what i read, it seems to me like in the Eastern Catholic church: penalties are given through a trial (for example, major excommunications), not automatically, there are also reserved sins.
In the Roman Catholic church, there are penalties that are given automatically, others that are not given automatically. Minor excommunication is not really spoken about, - if someone commits a mortal sin though they are bound to confess it before receiving Communion, as always was.
Vico, it seems to me like there are reserved sins in the Roman Catholic Church as well: for example heresy, schism, abortion, etc… some are reserved to the Bishop, some are to the Pope. In many dioceses, the Bishop has given his priests the ability to remove the excommunications reserved to him - it depends.