Postcrossing terminology?

Hi! Is there a post on terminology in the forum? I’ve been reading some threads and people are talking about ‘official’ cards, lottery cards, bingo, etc etc and I don’t know what these mean. Is there a post somewhere explaining all these? Thanks :slight_smile:

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If you scroll the main page of this forum, you will see a section for Games and Activities, there you will find bingo and lottery also tags and round robins. For the explanation of each I think you may find it in each section.
About “official cards”, they are cards sent or received through the main Postcrossing site (not the Forum)- the one with an ID