Carbon offset validity fraud is a fast-growing problem within the global certified carbon offset marketplace. Carbon certificates are designated with a unique serial number determined by the issuing body. These serial numbers can be duplicated, and fraudulent certificates can be created and then sold to unsuspecting buyers which may result in fines. In addition, once a carbon offset certificate is used by an end party, the certificate must be retired. These retired certificates can resurface on the marketplace and be fraudulently resold. By digitizing the certificates with their corresponding serial numbers on the blockchain as an immutable asset, ECO then tracks the life of the certificate using this public ledger. Duplicate serial numbers cannot be created and once the certificate is retired, it is recorded on the blockchain and cannot be resold. Evergreen Carbon Offsets is THE trusted source for authentic, verified carbon offsets.