1. A computer-implemented method, comprising: receiving an image of a document at a mobile device; performing optical character recognition (OCR) on the image of the document; extracting data of interest from the image based at least in part on the OCR; and validating the extracted data of interest against reference information stored on the mobile device; wherein the validation comprises device-based validation; wherein the device-based validation comprises normalizing the extracted data of interest to match a predetermined format; and wherein the reference information comprises an immutable or substantially immutable identifier of the mobile device.