What is the ruling on distinguishing a grave with a marker or painting it with paint?

Question:
What is the ruling on placing markers on graves, or painting graves with paint so that the owner of the grave can be identified?

Answer:
A marker that only he knows, such as placing a line or a stone, is permissible. The Prophet (peace and blessings be upon him) placed a stone on the grave of Uthman ibn Maz'un (may Allah be pleased with him) in order to identify it for visiting.
As for writing, plates, paint, and plaster, the Prophet (peace and blessings be upon him) forbade plastering graves, decorating them, and writing on them. This is what is permissible because it is an exaggeration regarding graves, and because it draws the attention of the common people to them. They say, "This grave has a special status; it was not painted unless it has a special status, and it has a position, belonging to a wali (close friend of Allah) or something similar." This makes graves distinguish one from another by a special marker, except for something like a stone or something that has no secret and nothing in it. Yes.