I once had an FDIC examiner ask if we used the census data on the flood cert. I answered no, he then went on to say for RESPA-covered loans it was a possible something-for-nothing violation. I have been very careful to never use that information, We print FFIEC for each file. If no hit there, as someone previously indicated - overlaying google maps with FFIEC, and keeping the proof works. We have QuestSoft, but I always defer to FFIEC, since it's government-published, and examiners would have a more difficult time criticizing that data.