Informal principle that the first finder of something unowned or abandoned may keep it
Finders, keepers, sometimes extended as the children's rhyme finders, keepers; losers, weepers, is an English adage with the premise that when something is unowned or abandoned, whoever finds it first can claim it for themself permanently. The phrase relates to an ancient Roman law of similar meaning and has been expressed in various ways over the centuries. The 1982 English Court of Appeal case P... Wikipedia