A boutique investment firm that promises benchmarked returns to its clients has been accused of falsely implying that it has financial backing from private equity giant Blackstone Capital.

Former head of institutional investments Jason Mistry has alleged in an unlawful dismissal case that C2 Capital Investor Channels relied on “fraudulent documents” suggesting it had access to millions of dollars in credit from Blackstone, HSBC and oil and gas giant Wintershall Holding.