Writing advertisements and names on the mushaf

Question:
First, a comment on those who defile the Book of Allah the Exalted by writing certain indecent names on it. I have seen copies with some indecent advertisements written on them, including an MBC advertisement and the word "Ikea," and words that are not fitting for the Book of Allah, like this.

Answer:
It is not permissible to degrade the words of Allah or to write names on them, except perhaps the name of the owner. It is best not to write the name of the mushaf's owner at all, but if he writes it out of fear that the mushaf will be lost, or to indicate that this mushaf is his for a specific need, there is no harm. However, writing names for the sake of frivolity is not permissible. It is difficult to understand this matter, to the extent that the Companions and the Salaf disliked writing the divisions (tash'ir) and the names of the surahs. They said: Do not write anything that strips the Qur'an of its purity; do not write divisions, surah names, or anything else; let the Qur'an be pure. But many scholars say that necessity calls for the divisions and the writing of surah names. When necessity calls for this, there is no harm. As for writing things for the sake of frivolity, this is not permissible. If the intention is to degrade it, then this is apostasy from Islam. If he intends to write names on the mushaf that insult the Qur'an, this is considered apostasy from Islam. But if he did not intend that, and it was merely for the sake of frivolity, then this is considered disliked or forbidden.