Question 22: Some Christians live in our village, and unfortunately some Muslims believe that the Christians are trustworthy so they deposit their trusts with them and not with the Muslims. A Muslim once gave a Christian Zakaat-ul-Fitr (obligatory charity paid before the Festival of Breaking the Fast) and charged him to distribute it among the poor. Is this permissible? Will this Zakaah be accepted from this Muslim?
Answer: It is not permissible to authorize a Kaafir (non-Muslim) to distribute Zakaat-ul-Fitr for he is not entrusted matters related to religion. Thus, the obligation will not be discharged except after the person on whom Zakaat-ul-Fitr is obligatory pays a substitute for it... read more here.