How to tell if a swap site is reusing deposit addresses across multiple users

05 September 2026

You can tell if a swap site is reusing deposit addresses by sending two separate small test transactions to the same address from different wallets and checking whether the site credits both. If the site accepts funds from multiple users at the same address, that is address reuse.

Address reuse is a red flag. Legitimate swap sites generate a fresh deposit address for each transaction or at least for each user session. When a single address collects deposits from many people, several problems follow.

Why reuse matters

A swap site that reuses addresses is cutting corners. Generating new addresses costs almost nothing with modern software. If a site skips that step, it likely skips others too - proper accounting, transaction monitoring, or basic security checks.

Reused addresses make it impossible for you to verify that your deposit arrived correctly. On the blockchain, you see that funds were sent to the address. But you cannot tell which of the many deposits sitting there belongs to your swap. If the site claims it never received your funds, you have no way to prove otherwise.

This creates a convenient excuse for the site. They can blame "network delays" or "system errors" when they have simply lost track of whose money is whose. You have no recourse.

How to check for reuse

Before sending any meaningful amount, do this:

1. Generate a swap request. Note the deposit address the site gives you.
2. Send a very small amount from Wallet A to that address. Wait for the site to credit it.
3. Start a completely new swap request. Look at the deposit address again.
4. If it is the same address, send another tiny amount from Wallet B.
5. If the site credits both, it is reusing that address for multiple users.

A clean site gives you a different address each time. A reused address on a second request is the clearest sign.

What else to watch for

Check the address on a block explorer before you send. If the address already shows a history of many incoming transactions from different senders, reuse is happening. Some legitimate services use a single address per user across multiple swaps, but that is different from sharing one address among strangers.

Also look at the format of the deposit address. Sites that generate fresh addresses typically use hierarchical deterministic wallets. The addresses will look random and unrelated. A site reusing addresses often hands out the same static address repeatedly.

What to do if you see reuse

Do not send the full swap amount. Cancel the transaction. Find another service. The risk is not worth saving a few minutes.

If you have already sent funds to a reused address and something goes wrong, your situation is worse than with a clean site. The sibling page "What to do when a swap completes on the blockchain but the exchange shows nothing" covers general recovery steps. But with address reuse, you have an extra problem: even if the site wants to help, they may genuinely not know which deposit is yours. Screenshots of your transaction hash are still your best evidence, but the outcome is less certain.

The broader picture

Checking for address reuse is one of several checks worth making before sending funds anywhere. The hub page "Swapping crypto safely" covers the full set of precautions. Address reuse alone is enough reason to walk away. Combined with other warning signs - no published fee schedule, no clear terms, poor support - it tells you the site is not running a professional operation.

A swap site that cannot generate unique addresses cannot be trusted to handle your money. Move on.

Back to perpetuals