What is the ruling on giving charity to innovators (Ahl al-Bid'ah), or to those who do not establish prayer, or who openly commit sins, and does the one who gives charity in these cases deserve the full reward and recompense?

Charity is of two types: obligatory (Zakat), which is disbursed to its eight categories mentioned in the Quran, and non-obligatory (voluntary charity). Voluntary charity is permissible for non-belligerent disbelievers, innovators (heretics), and sinners, provided that it is not exploited for disobeying Allah or harming Muslims. This is supported by the general meaning of Allah’s saying: "And they give food, in spite of love for it, to the needy, the orphan, and the captive," and the Prophet's (peace be upon him) saying: "For every wet liver (living being), there is a reward." It is better for a Muslim to direct their charity towards the pious if the sinners are not in severe need, as the Prophet (peace be upon him) said: "Do not accompany anyone but a believer, and let no one eat your food but a pious person." This saying, however, pertains to food for invitation, not food for necessity. Voluntary charity to innovators and sinners is permissible and rewarded, as long as it is not known that it will be used for evil; otherwise, it would be considered cooperation in sin. As for obligatory charity to a sinful Muslim, it is permissible if they are deserving of it and do not use it to support their sin, though giving it to someone else is better.