When using a mobile device, the homeowner can only use new photos that have originated on that device. We do provide an option for VALIDITY to be used on a desktop or laptop device to support wider adoption. In these cases, the metadata in the uploaded photo would be used to verify location and time provided it is present. If the photos do not have metadata available, the same warnings, flagging and homeowner required comments would be present so the appraiser would be aware of the situation when they perform their review.