Field visit report requirement for GST site verification: structured officer inputs, location data, proof, and document checks. Form GST REG-30 prescribes the mandatory structure for a field visit report under rule 25, requiring officer and task identifiers, visit particulars (date, time, coordinates, boundary descriptors), confirmation of address consistency, particulars of the person present, business functioning status, premises area and floor, document verification, photographic evidence, comments, and officer signature and jurisdiction.