Short answer
The three stages every card payment passes through, what happens at each, and why amounts can change between the tap and the final statement line.
Three Stages, One Payment
Every card payment moves through three stages. Authorization is the real-time question — may this transaction happen? — answered by the issuer in seconds. Clearing is the exchange of final transaction records between merchant and issuer, usually within a day or two. Settlement is the actual movement of money between the parties through the card network. The tap takes a moment; the money finishes moving later.
Authorization: The Real-Time Decision
When a card is used, an authorization request races from the merchant through the acquirer and network to the issuing side. There, in milliseconds, the platform checks the balance and every control on the card — limits, merchant category, country, channel — and returns approve or decline. Programs on a modern card issuing platform receive this event as a webhook while the customer is still standing at the till, which is what makes instant spend notifications possible.
Clearing: The Final Numbers Arrive
Authorization amounts are not always final. Hotels authorize estimates; fuel pumps pre-authorize a cap; restaurants add tips. Clearing is when the merchant submits the completed transaction, and the final amount can differ from the hold. Ledgers that treat authorizations as final discover this the hard way — correct program accounting reconciles against clearing records, with the authorization as a pending state.
Settlement: Money Actually Moves
Settlement nets the cleared transactions and moves funds between the parties through the network. For a program operator, settlement events close the loop: the pending authorization became a cleared record and then settled cash. Platforms stream all three stages as events, so a program's ledger mirrors network reality without manual file handling — and disputes or chargebacks reference precise, staged records.
Why did a transaction disappear from a statement?
An authorization that was never cleared expires and the hold releases — common with cancelled orders and hotel deposits. It was never money moved, only money reserved.
Why can the final amount differ from the notification?
The notification fires at authorization; tips, fuel totals and currency conversion can adjust the amount at clearing.
Where do chargebacks fit in?
After settlement — a chargeback is a formal reversal flow against a settled transaction, with its own evidence and timelines.
The NetPay247 team writes about card issuing, Virtual IBANs, cross-border payments and building products on embedded finance infrastructure.
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