April 10, 2026
You click send. Your supplier in Vietnam clicks receive. In theory, money should move instantly. In practice, it takes four days, costs 6% in fees, and sometimes just stops somewhere in the middle with no explanation. Here is what actually happens.
Most cross-border payments do not go directly from your bank to the recipient's bank. They travel through a network of correspondent banks — intermediaries that have pre-established relationships with each other. A payment from a French bank to a Nigerian bank might route through a French bank, a UK clearing bank, a US dollar clearing network, and finally a Nigerian correspondent before arriving.
Each hop takes time. Each hop may charge a fee. And each hop is a potential failure point. If any bank in the chain decides the transaction needs additional verification, the payment sits.
The most common failure points are not fraud or errors. They are compliance triggers. Banks are required to screen transactions against sanctions lists, anti-money-laundering rules, and correspondent banking policies. A transaction that looks routine to you can trip a filter at any point in the chain.
Common triggers include: round-number amounts, first transactions with new counterparties, destinations on certain high-risk lists, and any mismatch between the stated business purpose and the transaction pattern.
When a transaction is flagged, the bank holding it usually sends a request for more information — to the sending bank, not to you. The sending bank may or may not tell you what happened.
Every cross-border payment that crosses a currency boundary involves an exchange. The rate you see quoted is rarely the rate applied. Between the interbank rate and what you pay, there is a spread — the bank's margin — plus any markup your own bank adds for cross-currency transactions.
This spread is rarely disclosed clearly. It shows up as a slightly worse exchange rate rather than a line-item fee, which makes it easy to miss until you do the math.
New payment rails — SWIFT gpi, regional real-time settlement networks, and fintech overlay services — reduce the number of correspondent hops and provide better tracking. The key difference is pre-funded liquidity: instead of moving money through a chain of intermediaries, some networks pre-fund local currency accounts in each market and move money by instructing which account to credit and debit.
This is how payments services like REasy can settle in hours instead of days. The money does not actually travel across borders in the traditional sense. A local account is credited immediately, and the books are settled across the network.
Understanding the mechanics matters because it changes how you plan. If you rely on international payments to fund operations, you need to build float. If you are paying suppliers, you need to time payments around settlement windows. And if a payment fails, you need to know the right question to ask your bank — which is almost never "where is my money" and usually "which bank in the chain flagged it and why."