Companies can express their support for the TCFD recommendations by having their name added to the list of supporters on the TCFD website: https://www.fsb-tcfd.org/supporters-landing/

Types of organizations supporting the TCFD recommendations include organizations with public debt or equity and asset managers and owners ─ the preparers and users of financial disclosures. Other supporters range from industry associations, to central banks, governments, regulators and others. [Source: https://www.fsb-tcfd.org/wp-content/uploads/2018/07/TCFD-FAQ-Supporting-the-TCFD-Recommendations-June-2018.pdf]