In general : every QSO on a new band or in a different mode or from a different location will be confirmed.
I do send paper QSL cards via the QSL Bureau, but only when you are a member of a QSL Bureau too !
Receiving my paper QSL card will take a while because of the long journey.
Confirmation of my QSO’s also take place via Logbook of the World, ClubLog ánd eQSL.
Your confirmation via Logbook of the World is greatly appreciated, so please join LotW !!!