A cryptocurrency payment moves tokens from one blockchain address to another, authorised with a private key held by you or by an exchange on your behalf. Once confirmed, it generally cannot be reversed, and only the recipient can send the money back. There is usually no chargeback or compensation scheme. Transactions sit on a public ledger, prices can move sharply, and consumer regulators warn that demands for crypto payment are a common sign of a scam.
On this page
How a crypto payment works
Cryptocurrencies run on blockchains: shared public ledgers maintained by a network of computers rather than a single bank1. To send funds, your wallet signs the transaction with a private key, which proves it came from the owner of the wallet1. The network then records it.
Each coin or token uses a network with its own speed, fees and rules. This page covers the general principles. The pages on BTC and USDT cover those assets specifically.
Self-custody and custodial wallets
With a self-custody wallet, you hold the private key or recovery phrase. If you lose it, nobody can restore access; Bitcoin.org warns that without a backup, funds can be gone permanently2.
With a custodial wallet, such as an account at an exchange, a company holds the keys for you. That moves the risk onto the company's security, solvency and willingness to process withdrawals. The UK Financial Conduct Authority lists firm failure, poor segregation of client funds and cyberattacks among the ways people can lose crypto3.
Reversibility
Crypto payments are final in a way card payments are not. The US Federal Trade Commission explains that once you pay with cryptocurrency, you can usually only get your money back if the person you paid sends it back4.
A mistyped address, the wrong network, or a payment to a fraudster is in most cases a permanent loss.
Consumer protection
The FTC also points out that crypto payments do not come with the legal protections that credit and debit cards have4. In the UK, the FCA says it is highly unlikely that people will be covered by the Financial Services Compensation Scheme, and that anyone investing in crypto should be prepared to lose all their money3.
Licensing of crypto exchanges can add rules on how firms hold customer assets. It does not make individual transactions reversible.
Fees and price risk
Networks charge fees to process transactions, and those fees rise when demand is high. On Ethereum, for example, fees must be paid in ether and increase as users outbid each other during busy periods5. Exchanges and wallet apps may add their own charges for buying, selling and withdrawing.
Price movement is a less visible cost. The FCA describes cryptoassets as high risk and speculative3, and a balance can be worth noticeably less by the time it is converted back into ordinary currency.
Privacy
Crypto is often called anonymous. Pseudonymous is closer to the truth. Transactions are typically recorded on a public blockchain that lists every transaction4, and once an address is linked to your identity, for example through an exchange that verified you, your history can be followed.
Scams to recognise
- Payment demands: the FTC warns that only scammers demand payment in cryptocurrency and only scammers guarantee profits or big returns4.
- Address poisoning: attackers plant lookalike addresses in your transaction history, hoping you copy the wrong one. Ledger advises checking the full address, not just the first and last few characters6.
- Fake platforms: websites that display a growing balance but demand "tax", "verification" or "release" payments before any withdrawal.
- Recovery scams: contact from people offering to trace and return lost crypto for an upfront fee.
- Fake support: social media accounts posing as a wallet or exchange and asking for your recovery phrase. No legitimate service needs it.
What to check before using crypto online
- The recipient is identifiable, regulated where relevant, and reachable if something goes wrong.
- You know which network the recipient expects, and your wallet is sending on that same network.
- The full destination address matches, character by character.
- You have added up the total cost, including network fees, exchange spreads and withdrawal charges.
- You have considered how a price fall before you use or convert the balance would affect you.
- Your recovery phrase is stored offline and has never been typed into a website or shared.
Paying in crypto does not change what is lawful where you live. For the Maldives, see how gambling is treated under Maldivian law.