Searching for fabricantes de cintas transportadoras returns ranked lists, and ranked lists do not tell you whether a factory can hold the specification you need. This checklist turns the shortlist into an audit. Twelve items, each verifiable from documents or samples rather than from a sales reply: declared carcass and fabric type, cover grade against DIN 22102 or AS 1332, tensile rating against ISO 15236 and RMA tables, a splice proven on a real sample, vulcanizing equipment and crew competence, roller and component dimensions that match the drawing, the transmission side audited for V-belts and timing belts, heat and abrasion and flame grades documented separately, take-up travel and pulley diameters confirmed before quoting, capacity and lead time in writing, packing and marking for transit, and warranty terms with a named claim path. It also covers how to read a test report, which red flags should stop an order, and how to run the audit without flying to the factory.