When an immediate visit is not practical, ask for current documents and a live walkthrough organized around one product flow. The video can begin at the facility entrance, move through material identification and active production, then finish at inspection and packing. Date references and a planned route make the discussion easier to follow.
Supporting files may include business registration, address evidence, relevant audit pages, an example controlled specification, material records, inspection forms and a corrective-action example with confidential details removed. No single item proves the whole operation. Consistency among the legal entity, address, people, records and pictured workflow provides a stronger basis for deciding which onsite verification should follow.