Use only the official links below. No real recovery asks for your seed phrase or private key. If anyone offers to recover funds for you, it is a scam.

1. Polkadot 2017 sale DOT unclaimed

   Polkadot, Kusama

   $428 · 1 positionMay not work

   This Ethereum address bought DOT in the 2017 Polkadot sale, or got KSM in the 2019 Kusama drop, and never claimed it. You need the Ethereum wallet that bought it to sign one message.

   1. Follow the Polkadot wiki claims guide. In Polkadot-JS apps (Polkadot or Kusama), go to Developer > Extrinsics.
   2. Use claims.claim, or claims.claim_attest with the statement text if the row needs it.
   3. Sign the message with the Ethereum wallet that bought (personal_sign) and give a Polkadot account to receive. Part may be vesting-locked.

   Polkadot-JS apps (opens in a new tab)Official docs (opens in a new tab)

2. zkSync Lite balance not claimed

   $247 · 2 positions

   zkSync Lite was shut down on 2026-05-04. Remaining balances are claimable on Ethereum through a claim contract and a withdrawal portal. Your account is on that list and has not claimed.

   1. Open the zkSync Lite withdrawal portal and connect the wallet that owned the account.
   2. The portal finds your address in the final state, builds the proof and sends the claim. Follow its prompts.
   3. Confirm the Ethereum transaction. Tokens go to your L1 address. Matter Labs sponsors gas for the first 100,000 withdrawals.

   zkSync Lite withdrawal portal (opens in a new tab)Official docs (opens in a new tab)

3. KNCL never swapped to KNC

   Kyber (KNCL)

   <$1 · 1 position

   You hold old KNCL tokens that were never swapped to KNC. The KNC token contract still accepts them.

   1. Approve first: on the old KNC token (KNCL) 0xdd974D5C2e2928deA5F71b9825b8b646686BD200 call approve(spender = 0xdeFA4e8a7bcBA345F687a2f1456F5Edd9CE97202, amount).
   2. Open the KNC contract 0xdeFA4e8a7bcBA345F687a2f1456F5Edd9CE97202 on Etherscan, Write as Proxy tab, and connect your wallet.
   3. Call mintWithOldKnc(amount). It burns your KNCL and mints KNC 1 to 1.

   KNC contract on Etherscan (opens in a new tab)

4. dYdX v3 balance

   <$1 · 1 position

   dYdX v3 was shut down and its exchange was set to 'frozen' on Ethereum. Your USDC can still be taken out through the escape hatch, or withdrawn if already released.

   1. Open dYdX's v3 sunset post and use the Escape Hatch link in its last update. It is hosted by an independent third party.
   2. Escape needs a proof for your stark key and position. The page builds it; the escape call goes to StarkPerpetual 0xD54f502e184B6B739d7D27a6410a67dc462D69c8.
   3. Then call withdraw from your registered Ethereum address to receive the USDC. You pay Ethereum gas.

   dYdX StarkPerpetual contract (opens in a new tab)Official docs (opens in a new tab)