RECS rorting

I know for a fact that people are knocking on doors, giving away compact fluorescent bulbs, then asking the occupant to sign something that says the bulbs have been installed to replace incandescent bulbs. Whoever is behind this then earns a Renewable Energy Certificate (or part of one), even though the home may already have compact fluorescent bulbs. If anyone knows anything more about this, I'd be interested to know.