Q: Is it permissible to eat the food which is given in fatiha. Is fatiha permissible in Islam? If we receive such food then what is the hukum for the food?
A: If it is meant to pass on thawaab to the deceased etc. then this is sadaqah, and sadqah is supposed to be given to the poor.
Surah Faatihah is recited in every rakaat of namaaz. It is not a requirement for esaal-e-thawaab or for some type of charity.
And Allah Ta’ala (الله تعالى) knows best.