Interactive 5-minute micro-lessons on the payments nobody explains: card schemes, interchange, acquiring. Short concepts, instant quizzes, one take from the field per episode.
Micro-lessons in episodes, organised by season.
Season 1 · Follow the money
What really happens when a card pays €60?
E01~5 min
Visa, Mastercard, CB: the four-party model, explained by following a €60 payment.
Start the episodeE02~5 min
Who pays what on €60 of card sales, payments’ most misunderstood fee. Place your bet.
Start the episodeE03~5 min
Two networks on one chip, a single winner per payment, and what a domestic scheme is really for.
Start the episodeE04~5 min
One player signs both the cardholder and the merchant, funds and collects: AMEX, and your staff's meal-voucher card.
Start the episodeE05~5 min
Direct acquirer, processor, agent, payment facilitator: four setups, and the name on the contract does not always say who answers for the merchant.
Start the episodeE06~5 min
Immediate, deferred, credit: what the issuer actually advances, and how it blocks an amount without ever taking it.
Start the episodeE07~5 min
We've seen who says yes. This time, we follow the request itself: what it carries, and what a decline actually means.
COMING SOONNot episodes: working tools to keep within reach.
TOOL
Decode a TLV stream tag by tag, with a built-in encoder.
Open the toolTOOL
Compare two terminal configuration files and highlight what changed.
Open the toolTOOL
The life of an authorisation or a capture, and why a rejection is not a decline.
Open the toolTOOL
Every field in a config file resolved within its own block, with the nexo FAST section that defines it.
Open the toolREFERENCE
Every chip tag, explained: what the data is for, what it changes in a real transaction, where you will meet it.
Open the glossaryTOOLS
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