What would you do if the square footage was off by over 700 sq feet?

I saw some inconsistencies on a large custom home. We had the architural drawings, with one set of numbers. The public records which was different, and then the number the appraiser came up with which was different yet again. The house itself had very thick walls and lots of twists and turns in its styling.  A gentlemen at the county records office told me that due to staff shortages, it wasn't unusual to take aerial photos of homes built at the time this one was, and do a calculation off that.  Obviously, that would come up larger, as it may show roof overhangs. Which do you go by?

Lawsuits fly all the time over sqft issues. Many larger homes are extremely hard to measure with two story open spaces, dormers, bay windows, etc. Listing agents should consult their MLS rules and their local board for language that protects them from liability in case of discrepancies.

Repeating measurements from someone else without check leaves us a risk.  I am seeing more and more listings stating "Buyer to verify measurements". I am not sure if that relieves our responsibility, but it certainly, sends up the warning balloons.

There is language in our state buy sell agreement that states " buyer is responsible for verifying measurements during the inspection period". I doubt this would offer complete lawsuit protection though.