Jenner & Block


While not exhaustive, the below list includes some of Mr. Steffen’s representative matters:

FinTech and Blockchain matters


  • Advised online lender about litigation risk stemming from its relationship with bank partners and potential “true lender” issues. 
  • Defended lender in connection with consumer class actions (TILA, RESPA) and against unfair and deceptive trade practices (UDAP) allegations.
  • Represented lender in securities class actions stemming from allegedly false and misleading public disclosures. 
  • Advised online lender regarding the drafting of its master loan sale and servicing agreements.
  • Prepared AML/KYC policies for online lenders.

Payments, Blockchain, and Cryptocurrency

  • Counseled Fortune 50 U.S.-based international merchant about the impact of PSD2. 
  • Advised large FinTech company about the litigation, tax, and technical risks associated with accepting cryptocurrency.
  • Drafted insider trading, risk management, and other policies for company evaluating investment in cryptocurrency. 
  • Advised media clients about the legal risks of ICO sponsorship and investment in blockchain technologies.
  • Counseled emerging blockchain company about corporate structure, securities concerns, and litigation risks. 

Litigation matters and investigations

  • Defended subprime mortgage originator in three-week $1 billion trial in the District of Connecticut.
  • Represented mortgage originators and depositors in lawsuits related to their sale and securitization of billions of dollars of mortgage loans.
  • Defended High-Frequency Trader against employment and trade secret claims.
  • Represented mortgage company in connection with Justice Department investigation of its underwriting, sale, and securitization practices. 
  • Pursued $100 million dollar claim against a European-based industrial conglomerate on behalf of retiree committee. 
  • Conducted internal investigations of corporate clients accused of violating the Clean Air Act and the Foreign Corrupt Practices Act.
  • Pursued business tort claims against dozens of financial institutions on behalf of the trustee for a large bankrupt cable company.