Complyorelse, there are times, when I will look at the appraisal on a property, to see what the building looks like. Then I will utilize google maps satellite imaging to pinpoint the property, then switch the image to maps. At that point i can bring up the FFIEC geocoding website and pinpoint the property location there using the Google Map as a comparison. That gives me an accurate census tract.
Expect the worst, hope for the best and you'll never be disappointed.