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What does non-custodial mean?

“Non-custodial” means nobody keeps a balance for you. It doesn’t mean nobody ever touches your coins. Here is who holds what, and when, during an exchange.

By Hamish Webb · Last reviewed 30 September 2026

Custodial vs. non-custodial

On a custodial exchange you deposit coins into an account, and the exchange holds them. What you see is the exchange’s record of what it owes you. As ethereum.org puts it, you are trusting that exchange with custody of your funds.

With a non-custodial wallet, you hold the private keys. Nobody can move your coins without them, and nobody can recover them for you: your recovery phrase is the only way back in.

What happens during an instant swap

  • 1. You pick a quote on WalletExchange We pass the trade details to the provider you chose. We never receive your funds.
  • 2. The provider gives you a deposit address It is generated for this one exchange. You send the coins from your own wallet.
  • 3. The provider exchanges and pays out It sends the asset you are buying to the destination address you gave it.
  • 4. If it can’t finish, it refunds Refunds go to your refund address. SideShift, for example, cannot complete a refund until you give it one.

Who holds your funds, and for how long

Between steps 2 and 3, the provider controls the coins you deposited. Normally that is the few minutes it takes to confirm your deposit and send the payout. It can be longer when a network is congested, or when a transaction is flagged for review.

The providers WalletExchange compares describe themselves as non-custodial because they don’t keep accounts or balances for you. SimpleSwap says it does not hold user funds “unless there is a specific regulatory or legal requirement to do so”. StealthEX says instant exchanges don’t require storing funds on the platform, and SideShift says funds are not stored as part of user transactions.

Their own policies also allow for holds. ChangeNOW’s AML policy says a flagged transaction may be placed on hold, and SideShift pauses flagged shifts for human review. So in a swap, “non-custodial” means no stored balances. It does not mean zero exposure while your exchange is in progress.

What WalletExchange holds

Nothing. WalletExchange never holds, controls or can move your crypto, at any point. We will never ask for your recovery phrase, private keys or wallet password, and you should never send them to anyone.

Because the provider executes the exchange, its terms apply to your trade, and it handles holds and refunds. That is why every quote on WalletExchange links to the provider’s own policies.

Keeping the window short and safe

  • Always give a refund address If anything goes wrong, a refund can’t be sent without one.
  • Send exactly what the quote asks for On a fixed-rate quote, a different amount can be rejected and refunded instead of exchanged.
  • Keep the exchange ID It is what the provider’s support team needs to find your transaction.
  • Check the provider’s limits first Deposits below the minimum may not be processed.

Sources

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