Not Sure Which Missionary to Give To? How about giving to the Missionary Aid Fund (also known as the As-Needed fund? When donors give to this broad need, we combine all gifts received and then begin looking for missionaries who have special needs. Maybe they had medical out-of-pocket costs and do not have the money to pay for them. Vehicle and other necessities are at times very costly and can break even the most well-planned budget. Your contribution to the Missionary Aid Fund can be a great source of encouragement to a needy missionary.