Department profile
Sidley Austin LLP

FinTech Legal: Payments & Lending

FinTech Guide 2026 : USA - Nationwide


Sidley Austin LLP

Rankings

Chambers Review

Provided by Chambers

FinTech Legal: Payments & Lending - USA - Nationwide

Band 1

Band 1


What the Team is Known For

Sidley Austin is a market leader in securities law, broker-dealer licensing and state money transmission law matters. The team has impressive regulatory expertise in payments law and blockchain. It also advises on investment fund formation for FinTech funds, and handles capital markets matters and FinTech M&A.

Work Highlights

Provided by Chambers

  • Sidley Austin represented Nacha, the governing body of the payment system ACH Network, in its nationwide expansion of Phixius, its secure peer-to-peer payment-information network.

Strengths

Provided by Chambers

  • The team provided top-notch advice, were responsive and very creative in solving difficult issues.

    FinTech Legal: Payments & Lending respondentFinTech
  • They know our business really well and are able to provide practical, risk-based advice.

    FinTech Legal: Payments & Lending respondentFinTech
  • Sidley is highly responsive, professional, expert and strategic. They are indispensable.

    FinTech Legal: Payments & Lending respondentFinTech

Notable Practitioners

Provided by Chambers

  • Band 1David E Teitelbaum
    Band 1David E Teitelbaum

    David E Teitelbaum

    David Teitelbaum has great expertise in payments law and blockchain-related matters. He advises payments platform businesses and crypto projects on regulatory matters, including anti-money laundering compliance.
    • Dave is one of the best lawyers I've worked with. He has a brilliant mind, and an unmatched depth of pure legal acumen and practical problem-solving. I cannot recommend him highly enough.

      FinTech Legal: Payments & Lending respondentFinTech
    • Dave is extremely knowledgeable and gave practical risk-based advice. I have full confidence in all of the guidance that he provided.

      FinTech Legal: Payments & Lending respondentFinTech
    • Dave Teitelbaum has been instrumental advising our company on the launch and development of our business products.

      FinTech Legal: Payments & Lending respondentFinTech
  • Band 1Lilya Tessler
    Band 1Lilya Tessler

    Lilya Tessler

    Lilya Tessler is the New York head of Sidley's FinTech and blockchain services group. She is an industry leader in securities enforcement and regulatory issues pertaining to blockchain. Her clear understanding of the underlying technology is commended by a range of sources.
    • Lilya is terrific, she's very knowledgeable and able to put together the right team for the things we need. She has a deep knowledge of crypto and regulations in the US.

      FinTech Legal: Payments & Lending respondentFinTech
    • Lilya is very knowledgeable about the sector and where it is headed.

      FinTech Legal: Payments & Lending respondentFinTech
    • Lilya is the foremost subject matter expert in the space. She is a go-to.

      FinTech Legal: Payments & Lending respondentFinTech
  • Band 2Jess Cheng
    Band 2Jess Cheng

    Jess Cheng

    Jess Cheng joined Sidley Austin from another firm in March 2026. She has significant expertise in payments and cryptocurrency regulations and is highly commended by clients. Cheng formerly worked at the Federal Reserve Board of Governors.

    • Jess is very knowledgeable when it comes to money transmission. She is able to tell me immediately what works and doesn't work. She is really relatable and easy to understand.

      FinTech Legal: Payments & Lending respondentFinTech
    • Jess is one of my favourite outside counsel to work with. She is an excellent strategic thought partner, and her advice is practical and tailored to my company's needs.

      FinTech Legal: Payments & Lending respondentFinTech
    • Jess Cheng is fantastic. She is probably one of the most knowledgeable, pragmatic lawyers I have ever dealt with.

      FinTech Legal: Payments & Lending respondentFinTech
    • Jess is an absolute gem of a partner. She is extremely responsive, available and leverages her intimate industry knowledge and experience to give very practical, actionable regulatory guidance.

      FinTech Legal: Payments & Lending respondentFinTech
    • It's hard to overstate Jess Cheng's knowledge. She literally wrote the books on key legal areas for our business. She pairs that with amazing response times and practical commercial understanding.

      FinTech Legal: Payments & Lending respondentFinTech
  • Band 4Andrew Sioson
    Band 4Andrew Sioson

    Andrew Sioson

    Andrew Sioson is a partner at Sidley Austin and a member of its global securities enforcement and regulatory practice. Sioson is a former special counsel at the SEC's Division of Trading and Markets. He is well regarded for advising clients on SEC, FINRA, and other regulatory issues related to blockchain and cryptocurrency.

    • Andrew is a clear stand-out. He truly knows what white glove service means.

      FinTech Legal: Payments & Lending respondentFinTech
    • His expertise and depth in understanding of the underlying rationale for regulations allows him to think creatively and navigate grey areas of the law.

      FinTech Legal: Payments & Lending respondentFinTech
  • Band 4Kristin Teager
    Band 4Kristin Teager

    Kristin Teager

    Kristin Teager is a partner in Sidley Austin's banking and financial services practice group. She assists significant digital asset businesses with product initiatives, licensing and regulatory considerations. Teager draws notable praise from market sources for her expertise in digital assets and payments.

    • Not only does she have substantive knowledge, but she has excellent written and oral communication skills. She is also an excellent negotiator.

      FinTech Legal: Payments & Lending respondentFinTech
    • Kristin brings a rare combination of legal acumen, regulatory depth, commercial intuition and genuine partnership and very strong passion to the field.

      FinTech Legal: Payments & Lending respondentFinTech
    • Kristin Teager has a very large breadth of knowledge, she knows a range of things from regulations to particular contract provisions. She is incredibly prompt and always detailed.

      FinTech Legal: Payments & Lending respondentFinTech
  • Up and ComingAndrew Blake
    Up and ComingAndrew Blake

    Andrew Blake

    Andrew Blake is a partner at Sidley Austin and a member of its global securities enforcement and regulatory practice. Blake advises blockchain and financial service clients on regulatory issues around digital assets.

    • Andrew Blake knows the history and what has been tried and failed, he has innate knowledge of not just the law but the operation and practicality of getting things done.

      FinTech Legal: Payments & Lending respondentFinTech

Ranked Individuals at Sidley Austin LLP (7)

USA - Nationwide

  • Profile image of David E Teitelbaum

    David E Teitelbaum

    FinTech Legal: Blockchain & Cryptocurrencies

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  • Profile image of Lilya Tessler

    Lilya Tessler

    FinTech Legal: Blockchain & Cryptocurrencies

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  • Profile image of Andrew Sioson

    Andrew Sioson

    FinTech Legal: Blockchain & Cryptocurrencies

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  • Profile image of Kristin Teager

    Kristin Teager

    FinTech Legal: Blockchain & Cryptocurrencies

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  • Profile image of Andrew Blake

    Andrew Blake

    FinTech Legal: Blockchain & Cryptocurrencies

    View profile

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