In , passwords are used at the Post Office to unlock specific rewards, items, and currency. While most of these are discovered through "Mailbox" riddles, some are secret or associated with specific quests.
The community website buddy.farm/passwords/ also provides detailed clues for each password, which is a great tool if you want to solve them without looking up the answer directly.
: For those who don't enjoy puzzles, the community's dedication to maintaining lists like Buddy's Almanac ensures no one misses out on free items.