What is the ruling on placing stickers that contain noble prophetic supplications on cars, doors, and so on?

There is no harm in writing down supplications and recording them to remind people, as many do not memorize them, and it becomes easier to read them when they are recorded. Examples of this include writing down the supplication for the expiation of the مجلس (gathering) to alert those present, and writing down the supplication for riding and travel in cars.