SFI is a is a fully independent, non-profit charitable organization that promotes sustainable forest management. The Sustainable Forestry Initiative (SFI) label is a sign you are buying wood and paper products from well-managed forests, backed by a rigorous, third-party certification audit. In the US and Canada, requires an auditable system to characterize the lands from where raw materials are procured and improve rates of compliance with best management practices. For sources outside North America, it requires participants to assess and address risk of acquiring materials from unwanted sources.
http://www.sfiprogram.org