I suggest that in game there should be a item like letter or paper on which we can write anything any message.
we can send it to players packing in parcel and making present. It can be used by player to make ingame notes and sending messages in box can be super fun. It can be used as in making trade bills. Items and their price can be mentioned. It can be used for promotion letter of faction and companies like we see brochure in real life.
Thank you
share your integrated ideas on it