What your wallet signs during a failed swap

When you send cryptocurrency to a swap site, your wallet signs a transaction. That transaction transfers ownership of your coins to an address the swap provider controls. If the swap fails, the signature is still valid. The coins moved. The question is whether they can move back.

A swap is a short sequence of events. You send coins to a deposit address. The swap provider detects the incoming transaction. The provider locks the exchange rate, executes the trade on its side, and sends the output coins to your destination address. If any step in that sequence breaks, the swap fails. Understanding which step broke tells you what you can recover, and what you cannot.

Why my swap shows as completed on the blockchain but the coins never arrived

The blockchain records every confirmed transaction. If your outgoing transaction shows as completed, the coins left your wallet. The swap provider received them. But "completed" on the blockchain means the transaction was included in a block, not that the swap finished. The swap provider may have received your coins and then failed to send the output. That is a provider-side failure. The blockchain does not record that failure.

Check the swap provider's order status page using the swap ID or the deposit transaction ID. If the provider's system shows the swap as completed, but you see no incoming transaction at your destination address, the output transaction may have been sent to the wrong address, or the provider may have credited the wrong network. If the provider's system shows the swap as failed, the coins are still with the provider. You have a claim on them.

What happens to my deposit if the swap site goes offline while my trade is processing

If the swap site goes offline after your deposit transaction is confirmed, the coins are on the provider's wallet. The provider controls that wallet. If the site never comes back, the coins are effectively lost. No automatic process can return them. No third party can force a return.

If the site returns after a temporary outage, the swap may resume from where it stopped. Most providers record the state of each swap in a database. When the server restarts, it should process pending swaps. But if the database is corrupted or the server is restored from an old backup, the swap may be unrecoverable. There is no guarantee.

How long can a manual refund from a swap support team really take

Manual refunds are not automatic. A support team must locate your deposit, verify your identity or ownership of the sending address, and initiate a return transaction. The time varies by provider and by workload. Some providers process manual refunds within hours. Others take weeks. Some never respond.

The refund process is not regulated. The provider sets its own timeline. If the provider is a small operation with a single support person, a manual refund can take months. If the provider is large but receives many tickets, your request may sit in a queue. The only reliable way to speed it up is to provide clear evidence: the transaction ID, the deposit address, the destination address, and the exact amount sent.

Can I recover coins sent to an expired swap deposit address

Expired deposit addresses are a common cause of failure. Swap providers generate a fresh deposit address for each swap. That address has a time limit, usually between 15 minutes and a few hours. If you send coins after the address expires, the provider's system may not recognize the incoming transaction. The coins arrive at the address, but no swap is created to process them.

Recovery is possible if the provider monitors its wallets for unexpected deposits. Some providers sweep all incoming funds to a central wallet and then manually process refunds. Others ignore unrecognized deposits entirely. If the provider sweeps the wallet, your coins are mixed with other deposits. Recovery requires a manual refund request, and the provider may charge a fee. If the provider does not sweep the wallet, the coins sit at the expired address indefinitely. The provider holds the private key. You do not. You cannot recover them without the provider's cooperation.

What a swap provider does when you accidentally send below the minimum amount

Every swap has a minimum deposit amount. If you send less than that minimum, the provider's system may reject the swap. The coins arrive, but no trade is executed. The provider may hold the funds in a "below minimum" bucket. Some providers automatically return below-minimum deposits after a set period, minus a fee. Others do not. The provider's terms of service govern this.

If the provider does not return the funds automatically, you must request a manual refund. The provider may deduct a fee for the manual processing. The fee is often larger than the deposit itself, making the refund worthless. Always check the minimum amount before sending.

Why some failed swaps get an automatic refund and others need a support ticket

The difference is whether the provider can detect the failure and reverse it programmatically. Automatic refunds happen when the provider's system can identify that the swap cannot proceed and can sign a return transaction without human intervention. This is common for failures like network congestion, where the provider can simply return the deposit to the sender.

Support tickets are needed when the provider cannot determine who should receive the refund. This happens when the deposit arrives but the swap ID is missing, or when the deposit address is reused across multiple swaps, or when the sender address is not associated with the swap. The provider must manually inspect the blockchain data and decide where to send the funds. That requires a human.

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

Swap addresses are generated for a single swap. If you send two deposits to the same address, the provider's system sees the first deposit and creates a swap. The second deposit arrives after the first swap is already processing or completed. The provider's system may not know what to do with the second deposit. It may be ignored, or it may be credited to the same swap, which would mean you receive the output for the combined amount at the original exchange rate. That is unlikely. Most providers treat the second deposit as an orphan.

Recovering the second deposit requires a manual refund request. You must prove that you sent both transactions. The provider may refund the second deposit minus a fee. The first swap proceeds normally.

How to tell if a swap is stuck in pending versus permanently failed

A pending swap shows a status of "waiting for deposit" or "processing" on the provider's order page. If the status has not changed for more than an hour after the deposit was confirmed, the swap is stuck. A permanently failed swap shows a status of "failed" or "expired". The provider's system has explicitly marked it as unrecoverable.

If the status is "pending" but the deposit transaction is confirmed, the provider's blockchain monitor may be slow. Wait. If the status is "pending" for more than 24 hours, the swap is likely stuck. Contact support. If the status is "failed", the provider has decided the swap cannot complete. You must request a manual refund. Do not send more coins to a failed swap address. The address is dead.