Our local community has an organization that handles requests for assitance from churches (or other smaller organizations). If we get a phone call for help, we direct them to this group. That group can then act as a clearing house for the specific need(s). A number of churches in our town specialize in particular areas. My church has a clothing ministry. Another does personal care products, another furniture, another appliances, another housing needs, etc. It prevents the con artist from hitting up every church or organization for money with the same story, again and again. When a need is real, we get information from the parent group concerning the individual or family and an appointment is set up to fill the request. It certainly has cut down on the number of unsolicited calls, as the con artists will have usually been directed to the main groups a number of times before they get to our number in the phone book.(sometimes it's good not to be first alphabetically).
People with real needs are then served with the limited resources that are available.