Cossar said there's a lot at stake generating around 20,000 international visitors, generating 431,000 international visitor bed nights, and having a GDP impact of $135 million.
Cossar hopes fans will steer clear of people selling unofficial tour product.
"The sale of these types of goods directly exploit the event and may impact on New Zealand's reputation as a world-class major event host," he said.
"MBIE will continue to take a no-tolerance approach to the sale of unauthorised goods that exploit the Lions Series and will continue to work closely with local council's and other government agencies to stop this activity."
Under the Act, Lions Series sponsors have protections from unauthorised commercial exploitation of the event, specifically including: unauthorised association with the event, ticket-scalping, trading in a clean zone, and advertising in, or visible from, a clean zone.
The Act is designed so that New Zealand's economy gets maximum benefit from major events like the Lions Series.