What can I recover if I sent less than the exact quoted amount

07 September 2026

You can recover the full amount you actually sent, minus any network transaction fees that were already spent to move it. Nothing beyond your deposit is owed to you, because the swap never executed.

The core reason is simple: a cryptocurrency swap is a two-step agreement. You agree to send a precise quantity. The exchanger agrees to convert that precise quantity into the destination asset. If you send less than the quoted amount, the exchanger’s system cannot honor the rate it displayed. The rate was calculated for the quoted volume, not for a smaller one. Most exchanges handle this by rejecting the deposit outright. They will not complete a partial swap at the original rate, and they will not recalculate a new rate for the amount you actually sent.

What happens next depends on the exchanger’s internal rules. Some exchanges hold the underpaid deposit and display a warning in your swap history. Others automatically issue a refund to the sending address, minus the blockchain transaction fee they paid to move your coins from their deposit wallet. A few will attempt to contact you through the swap interface - if you left an email or a return address - but this is not guaranteed. The most reliable outcome is a refund, not a completed swap.

You do not lose the whole deposit. You lose only the network fee that the exchanger spent to forward your coins back to you. That fee is typically the same as the fee for any normal transaction on that blockchain. It is not a penalty or a service charge. It is a real cost the exchanger incurred to move your coins.

There is one edge case: if your underpayment is tiny - say, a few cents worth of a token - the exchanger may decide that the refund transaction fee exceeds the value of the deposit. In that scenario, some exchanges simply leave the coins in their wallet and treat the swap as abandoned. You have no practical way to recover those coins, because the cost of recovery would exceed their value. This is rare, but it happens.

You should also understand that “less than the exact quoted amount” does not mean the same thing as “the deposit arrived with a small variance due to network latency.” Some exchanges allow a small tolerance - usually a fraction of a percent - for timing differences in the deposit. If you sent exactly the quoted amount but the network credited a slightly different figure because of block timing, the swap often proceeds. The problem only arises when you deliberately or accidentally send a clearly smaller quantity.

If you sent less because you made a mistake - copied the wrong number, misread the quote - your path is to accept the refund and start a new swap at the current quoted rate. Do not expect the exchanger to honor the old rate. Rates change constantly.

For a fuller picture of what happens when a swap fails for any reason, read the hub page: What you can recover from a failed swap. That page covers the general refund rules and the few exceptions where recovery is impossible. The answer here is specific to underpayments only.

In summary: you get back what you put in, minus the cost of moving it back. You do not get the destination coins. You do not get compensation for the time lost or the rate change. The exchanger’s obligation ends with returning your deposit, because you did not fulfill your side of the trade.

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