What is the ruling on writing papers including Ayahs from the Qur'an and invocations and sticking them on any part of the body
like the chest and the like, or folding them to put them on the molar?
It is not permissible to stick papers including Ayahs from the Qur'an or supplications on the body or on any part of it or put them under the bed and so on; because this takes the same ruling of wearing amulets, which is forbidden according to the saying of Allah's Messenger (peace be upon him),
If someone wears an amulet, Allah will not accomplish his affairs for him and if someone ties a cowrie shell, Allah will not protect him.
Moreover, he (peace be upon him) says,
[Illegal] Ruqyahs, amulets and love-potions are [acts of] Shirk.
May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.