What was written on the note in One Piece Luffy's hat?

The note in One Piece Luffy's hat had not been publicly disclosed. In One Piece, the contents of the note were kept secret and only Luffy and his companions knew about it. This plot was to portray the trust and friendship between Luffy and his companions, as well as their relationship of helping and supporting each other in their adventures. Therefore, the contents of the note would always be a mystery that only Luffy and his companions could reveal.