Ruling on grave markers on which are written details of the deceased

It is not permissible to write anything on the grave, whether it be
verses of the Qur’aan or anything else, on iron, stone tablets or anything
else, because it was reported from Jaabir ibn ‘Abd-Allaah (may Allaah
be pleased with him) from the Prophet
(peace and blessings of Allaah be upon him) that it is forbidden to
plaster the walls of graves, to sit on them or to build over them. This
was narrated by Imaam Muslim in his Saheeh; al-Tirmidhi and al-Nasaa’i
added, with a saheeh isnaad, “or to write on them.”