Property, Goods and possessions of others in Noahide Law
From Wikinoah English
Rabbi Yoel Schwartz (Jerusalem Court for Bnei Noah)
It is prohibited to cause damage to such things. If a person is given such a possession to safeguard or for any other reason even if it is worthless, it must be returned to its legal owner. You cannot keep it. A person is also not allowed to cheat on taxes.[1]