After giving much caution to the idea of donating to charities and religions asking for contributions, the WT org has this to say:
*** g93 6/8 27 "Charitable Contributions-A Christian Obligation? ***
Many prefer to help by personal, direct gifts to needy individuals and families. Thus, the givers are sure of the practical, immediate use to which their contributions can be put. This also provides opportunity to upbuild and express kindness in words as well as deeds. Even if you do not have much to give materially, you can still have the joy of giving. Next time you hear of a genuine need for such help, give what you can in the spirit of 2 Corinthians 8:12: “If the readiness is there first, it is especially acceptable according to what a person has, not according to what a person does not have.”
Have in mind, too, that sometimes what may do the most good is something other than money. Jesus told his followers to “go, preach, saying, ‘The kingdom of the heavens has drawn near.’ . . . You received free, give free.” (Matthew 10:7, 8) Similarly today, Christians realize that the time, energy, and money spent in supporting Kingdom witnessing—which improves lives and gives hope—is charitable giving of the best kind."
Of course we know that the time energy and money spent in supporting Kingdom witnessing is charitable giving of the best kind!!!!