What happens if I accidentally send two deposits to the same swap address

07 September 2026

The second deposit is not lost, but it will not be treated as part of your swap. Instead, it will be returned to the wallet you sent it from, minus any network transaction fees.

Here is why this happens.

When you begin a swap on this site, the system generates a unique deposit address for that specific transaction. That address is temporary. It is tied to one swap order with one quoted amount and one set of receiving instructions. The system expects exactly one incoming transaction at that address, for the quoted amount or within an acceptable range.

If you send a second deposit to the same address, the system sees an incoming transaction that does not match any open order. It has no way to know whether you meant to start a second swap, whether you are topping up the first one, or whether you made a mistake. The safe default is to treat the second deposit as an unintended transfer. The exchanger will return it to the sending address.

The return is not automatic in the sense of happening instantly. It depends on the exchange partner's policies and on whether the first swap completed normally. In most cases, the second deposit is returned after the first swap finishes. If the first swap fails for some other reason, both deposits may be handled separately: the first according to the failure rules, the second as an overpayment or duplicate.

There is one important nuance. If you send the second deposit before the first one is confirmed on the blockchain, the system may see a single incoming transaction with a total amount that combines both deposits. This can cause the swap to proceed with a larger amount than you quoted. The swap will still execute, but the exchanger will recalculate the output based on the larger input. You will receive more of the destination currency than you expected. This is not a problem, but it is also not something you can rely on. Different exchanges handle partial or aggregated deposits differently. Some will accept the combined amount and adjust the output. Others will flag the transaction as mismatched and hold both deposits until you contact support.

If the second deposit arrives after the first swap has already been matched and executed, the exchange partner's system has no active order to attach it to. The second deposit sits as an unassociated balance at the deposit address. Exchange partners have automated sweeps that detect these orphaned funds. They return them to the original sending address. The return transaction will incur blockchain network fees, which are deducted from the returned amount. You do not get those fees back.

You cannot cancel the return. Once the exchanger decides to return the second deposit, the transaction is broadcast to the blockchain. You must wait for confirmations.

What you can recover from a failed swap depends on which part of the process failed. If the second deposit was returned successfully, that part is already recovered. If the first swap also failed, you may need to follow the standard recovery steps described in the main article on that subject. The rules for recovering deposits from failed swaps apply to each deposit separately.

To avoid this situation entirely, do not reuse a swap address. Each swap generates a fresh address. If you need to make another swap, start a new order and send to the new address. If you accidentally send to an old address, the system will still attempt to return the funds, but you will wait longer and pay network fees for the return transaction.

In summary: a second deposit to the same swap address is returned to you, minus fees. It does not merge with the first swap unless it arrives before the first deposit confirms. And it is never lost permanently, though the return can take time.

Back to getting started