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    Posts by Sam Leslie-Miller

    Head of Operations

    • Privacy & security4 min read

      Can I See Some ID, Please? | How We Approach MID Security 🔐

      MIDs. Merchant IDs. What are they good for? Absolutely...something, actually. Highly useful and sometimes, somewhat overlooked - MIDs are a key component of Fidel’s service. It’s just a line of random characters, sure, but it’s also a lot more.

    • Company4 min read

      Fidel Forecast: What’s coming up in 2020

      We had a lot of wins last year – and there are more to come. Here's what to expect in 2020.

    • Company3 min read

      2019: Year in review

      In 2019 we've launched with AMEX, gone live in North America and grown our team internationally. What's next?

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    • Company1 min read

      Fidel on Rocket Fuel! 🚀

      Time for Fidel to share what we have been working on since the last blog post. Our milestones have always been with the end goal of simplifying card-linked technology – see what's new!

    • Company2 min read

      Fidel 2018 Update 🚤

      The worker bees have been busy here at Fidel over the last 6 months full steam ahead to make card linking more accessible.

    • Loyalty2 min read

      Linking the Online with the Offline World

      Small changes can make a significant impact on customer satisfaction and loyalty. Imagine if the customer didn’t have to do anything extra to benefit from an offer, just carry out a purchase using their bank card.

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    © 2025. Enigmatic Smile Ltd trading as Fidel. Fidel API uses a proprietary tokenization system and does not store any card numbers.
    All API requests use TLSv1.2 with end-to-end encryption. Fidel API receives transaction authorization messages
    typically within seconds of a successful authorization event.

    © 2025. Enigmatic Smile Ltd trading as Fidel. Fidel API uses a proprietary tokenization system and does not store any card numbers. All API requests use TLSv1.2 with end-to-end encryption. Fidel API receives transaction authorization messages typically within seconds of a successful authorization event.

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