How do I know a permit has really been cancelled on my behalf?

Each emissions permit that is created has a unique identification number and permits are kept in secure databases known as registries. Participants hold accounts within the database and exchange certificates when they trade. Sandbag is a registry account holder the permits that we cancel will all appear in our account. When you join Sandbag and we cancel permits on your behalf you will receive an electronic certificate with a unique number for each permit that has been destroyed. We will also periodically publish on this website copies of the registry account in which all our cancelled allowances are kept and cancelled so you can see exactly what is going on.