Amazon is tired of sellers hawking counterfeit goods on its ecommerce platform, and it’s now taking action to keep them off the site entirely. CNBC reports that the company has begun implementing stringent conditions for merchants who want to sell popular brands, such as one-time non-refundable fees of about $1,000-$1,500 per label and invoices from manufacturers or distributors that show the purchase of 30 items within the last 90 days.