Crypto transactions are irreversible. Once you press send and the network confirms it, there is no bank to call, no chargeback form, and no undo button. That single fact is why checking a wallet address before you send matters more than almost any other safety habit in crypto.

The good news is that a thorough check takes only a few minutes, and most of it is free. The checks below work whether you are paying a merchant, sending funds to a friend, or moving coins to your own wallet on a new device.

Start with the basics: verify the full address, not just the first and last few characters. Address-poisoning scams work by sending you tiny dust transactions from a lookalike address that matches the start and end of a real address in your history. If you copy from your transaction history instead of from the original source, you can end up sending funds to the scammer. Always get the address from the intended recipient through a trusted channel, compare it character by character, and use copy and paste or a QR code rather than typing it by hand.

Next, paste the address into a block explorer for its chain: Etherscan for Ethereum and EVM chains, Blockstream or Mempool.space for Bitcoin, Solscan for Solana. A healthy address usually has a plausible history: a reasonable age, a sensible number of transactions, and balances that look like real usage rather than a pass-through funnel. Explorers also apply public labels, and an address caught in scams may carry a bright phishing warning right on the page. If you see that banner, stop.

Then run the address through a community scam database such as Chainabuse, and check the sanctions list if the amount is significant. These databases are not authoritative, but a hit is a strong signal to walk away. Dedicated address-screening tools can go further, scoring how close an address sits to sanctioned entities, mixers, or known scam clusters. For a large or business payment, that extra check is cheap insurance.

Watch out for clipboard-hijacking malware, which silently swaps a copied address for an attacker's address when you paste. The defence is simple: after pasting, visually compare the pasted address against the original before confirming. Hardware wallets add another layer, because they show the destination address on the device screen itself, outside the reach of malware on your computer.

For any transfer that would hurt to lose, send a small test transaction first. Send a minimal amount, wait for it to arrive at the right place, and only then send the rest. It costs a small fee and a few minutes, and it is the single most reliable way to catch a wrong address, a wrong network, or a copy-paste error before it becomes expensive.

Network selection deserves its own check. USDT on TRON and USDT on Ethereum are different tokens on different networks, and sending to the right address on the wrong network can strand funds. Confirm the asset and the network with the recipient before you send, and make sure your wallet is set to that network.

Human-readable names such as ENS names can reduce copy-paste mistakes, but they are not magic. Verify that the name itself resolves to the correct address, since convincing phishing names exist too. And never share your private key or seed phrase with anyone, no matter what a support message claims: no legitimate check ever asks for them.

Put it together as a routine you run every time: confirm the address from a trusted source, compare the full string, check the explorer and a scam database, confirm the network, and test-send large amounts. Thirty seconds of caution protects funds that no support ticket can recover.