_FINANCIAL-OPERATIONS/
The Hidden Timeline of a Card Transaction
By Thierry Coopman · Product Specialist
Ledger
Accounting
Payments
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For most of us, a card payment feels instant: You tap, insert, or swipe, and the sale is complete. The merchant smiles, the customer walks away, and everyone assumes the money has moved.
But behind the scenes, there is much more happening after that swipe or tap happens. A card transaction passes through multiple hands—merchant, Point of Interaction (POI), provider gateway, acquirer, scheme, issuer processor—and those handoffs don’t happen in real time. And that means the timing of a promise or guarantee of funds is not the same as the funds actually being delivered; cutoffs at any point of the timeline can thus create delays that might seem arbitrary from the outside.
This is why the timeline of card payment matters: It can mean the difference between trusting your ledger (and your books generally), and being blindsided by a mismatch. The larger your operation, the greater the chance that such a mismatch has a ripple effect through cash planning, compliance, and even customer commitments. The timeline also explains why ordinary ledgers fall short, and why bi-temporality (the ability to record both when an event was requested and when it actually took effect) is essential.
When you actually look behind the scenes at what happens, the view can be disorienting at first, given that there are several players involved, and what these players do specifically in the transaction have different names. Here, then, we cover the basics of who is involved in card transactions, and what they do.
The players for a card transaction are usually described using what is called the “Four Corner” model, where the four entities are the cardholder, the merchant (or acceptor), the acquirer, and the issuer:
In addition to these four corners, there are Schemes, which are member organizations that impose rules and regulations which enable transactions between acquirers and issuers and their respective merchants and cardholders. Common schemes include Visa, Mastercard, Carte Bancaire, Dankort, Girocard, Bancontact, Multibanco, Interac, MIR, JCB, Discover…you get the idea.
Note that schemes apply "Scheme Fees" for these services, where acquirers and issuers apply "Interchange Fees" between each other for their respective roles in enabling the transaction.
As is probably becoming clear, what these players do has a vocabulary all its own. Thus, different events on the timeline might be described as:
Each corner has its own calendar and cut-off cycles and its own definition of “when the money moves,”. These differences explain why timing can feel so slippery.
So why does the Four Corner model matter? Why would anyone other than, say, an acquirer or issuer need to worry about the various players in a card transaction?
Put simply, a card transaction is much more than an exchange of money between a merchant and a customer. Because several players are involved, there are multiple ways in which records need to be transferred, and assurances or guarantees made. All of these additional steps take time, and so the timeline of card payments complicates.
In the next part of our series, we will begin to look in more detail at what actually happens between the cardholder and the merchant, with an eye to understanding the role that the acquirer and the issuer play. It is here that we will begin to see cases in which the timeline of a card payment can get more complex, requiring more precise tools to capture what is going on.
