A payment message is not yet final settlement
Sending a transfer gives the bank an authorised instruction. It checks details, available balance, security rules and legal controls before information moves to other participants. A status such as “sent” or a card authorisation need not be the same instant as legal and accounting finality between the banks.
Clearing determines who owes what to whom. Settlement discharges that obligation by transferring the agreed asset. Some systems process each payment individually in real time; others net many instructions over a period and settle only the difference.
A payment within one bank is simplest
If buyer and seller use the same bank, it can reduce one customer deposit and increase the other. This particular internal payment does not require reserves to be sent to another bank. The bank must still keep accurate records, protect access and follow rules for finality and disputes.
A payment between two banks also changes the relationship between institutions. The payer's bank owes the recipient's bank the value its customer sent. That interbank obligation must be settled under the rules of the system used.
Reserves close the obligation between banks
In the euro area, TARGET Services settle selected payments in central-bank money. T2 is the real-time gross settlement system for bank and other payments; TIPS supports instant settlement around the clock. Once reserves move from one bank's account to the other's, the banks no longer hold only a private promise between themselves for that settlement.
Using central-bank money as the settlement asset reduces credit risk between commercial banks. It does not remove operational, cyber, fraud or legal risk throughout the payment chain. That is why systems have contingency arrangements, limits, oversight and exact finality rules.
- authorisation: checking whether a payment may begin
- clearing: calculating the participants' obligations
- settlement: final transfer of the settlement asset
- crediting the customer: updating the recipient's balance under the system's rules
Bank transfers and Bitcoin transactions use different models
In Bitcoin, nodes check the signature and rules, and miners include the transaction in the proof-of-work chain. There is no separate layer of interbank reserves, but confidence grows with confirmations and a merchant may accept different risk for a small payment than for a large one. A valid but mistaken transfer has no built-in central dispute desk.
Banking can provide identity checks, fraud controls, reversal of some payments and credit, at the cost of a more complex chain of intermediaries and rules. Bitcoin combines transfer and settlement of its native asset in one public network, but it does not automatically resolve a dispute about goods, identity or user error.