The FSC Chain of Custody (CoC) system allows the tracking of FSC certified material from the forest to the consumer. It is a method by which companies can show their commitment to the environment and responsible forest management. Only companies that have FSC chain of custody certification are allowed to use the FSC trademarks and labels to promote their products. The FSC label therefore provides a link between responsible production and responsible consumption and helps the consumer to make socially and environmentally responsible buying decisions. Once a forest is certified it is important to be able to trace the products that come from it throughout the supply chain to ensure that any claims on the origin of the product are credible and verifiable. FSC chain of custody certification is a voluntary process. It is a tracking system that allows manufacturers and traders to demonstrate that timber comes from a forest that is responsibly managed in accordance with the FSC P&C. It tracks the flow of certified wood through the supply chain and across borders through each successive stage - including processing, transformation and manufacturing - all the way to the final product. It is up to a company to initiate the certification process by requesting the services of an accredited certification body to inspect its internal tracking procedures. Companies committing to FSC include home-improvement or DIY companies, publishers and retailers, amongst many others. All operations that want to produce an FSC certified product or want to make corresponding sales claims must comply with FSC's international standards for chain of custody. An operation must specify the range of products they wish to sell as FSC certified and promote with the FSC trademark. The certification body inspects the operation to ensure that controls are in place to identify eligible sources for the specified product range and to prevent certified and recycled material from mixing with material from unacceptable sources. If an operation complies with FSC standards, the company is issued an FSC chain of custody certificate. Major failure to comply with the standard will normally disqualify the candidate from certification or lead to de-certification. Controlled wood certification The FSC Mix label was introduced in 2004. It allows manufacturers to mix FSC-certified material with uncertified materials in FSC-labeled products under controlled conditions. It aims to avoid the use of wood products from "unacceptable" sources in FSC-labeled products. Unacceptable sources include illegally harvested wood,