Yes, writing down promises is useful because it helps people remember what they agreed to. When you write something down, it becomes a physical reminder of your commitment. This can be really helpful if there's ever a disagreement or if someone forgets what was promised. Plus, having it written makes the promise feel more serious and official, which can motivate people to keep their word.

Some people think writing down promises isn't necessary. They believe a verbal promise should be enough to show trust between people. Writing it down might make it seem like you don't trust the other person. For informal or personal promises, writing things down can feel unnecessary. In some cultures, oral agreements are even seen as more binding than written ones.