Arbitrum swap receipts and tax records

You are about to swap one token for another. The form on this page will send instructions to a set of liquidity pools and routers. You will get back a different token, minus network fees and a small exchange fee. What happens between click and confirmation matters for your records. Most of it happens out of your sight.

Here is what actually occurs. You approve a token contract to spend your tokens. The exchange routes your trade through one or more pools. The router contract executes the swap. The Arbitrum network confirms the transaction. You receive the output token in your wallet. The whole sequence takes seconds to minutes, depending on network congestion and the complexity of the route.

The trouble begins when you close the confirmation screen. That screen contains the only complete record of the swap that the exchange shows you. After you close it, the exchange has no obligation to keep a copy. What details should I screenshot before I close a swap confirmation screen are: the transaction hash, the amounts you sent and received, the token addresses, the pool addresses if shown, the date and time stamp, and the network fee paid. Screenshot or write down the hash before you click anything else. That hash is the unique identifier for the trade on Arbitrum.

You will lose the link to that page eventually. Every browser tab gets closed. Bookmarks get buried. How do I find a swap transaction hash on Arbitrum after I lost the link depends on what you saved. If you wrote down the hash, paste it into an Arbitrum block explorer. If you did not, you can search the explorer by your wallet address. Look for contract interactions that moved tokens you remember swapping. The hash will appear there. If your wallet has a transaction history, check that first. Many wallets list recent transactions with the network and hash visible.

Why would a tax office want my swap reference months after the trade is not a hypothetical question. Most tax authorities treat crypto trades as taxable events. The gain or loss depends on the value of the tokens at the moment of the swap. A swap reference lets you prove the date, the amounts, and the prices. Without it, you estimate. Estimation invites audit adjustments and penalties. The paperwork you save today determines whether you can answer a tax inquiry next year without reconstructing everything from blockchain data.

Can I prove a swap happened if the site I used no longer exists depends entirely on your records. The blockchain remembers the transaction. The exchange's frontend does not. If you have the transaction hash, you can prove the swap happened regardless of whether the site is online. The hash proves a specific contract interaction at a specific time on a specific block. That is stronger evidence than the exchange's database. If you lost the hash and the site is gone, you can still find the transaction by searching your wallet address on the block explorer. The trade will show as a contract call. You will see the token transfers. You will not see the exchange's label or interface.

How do I match a swap I made on Arbitrum to a deposit on another chain requires understanding cross-chain transfers. A swap on Arbitrum creates a transaction on Arbitrum. If you later bridge that output token to another chain, that is a separate transaction. The match is not automatic. You must trace the token's journey. Check the Arbitrum transaction to see which wallet received the output token. Then check the bridge contract or the destination chain explorer for a matching deposit. The amounts and timestamps should align within a plausible window. Some bridges offer transaction lookup by the source hash. That creates the link. Without that feature, you manually correlate by address and amount.

What swap records do non-custodial platforms keep and when do they delete them is a question about the interface, not the blockchain. Non-custodial means the platform never holds your tokens. It also means the platform keeps minimal records. Most store swap history in your browser's local storage. Clear your cache or switch browsers and that history vanishes. Some platforms log anonymous data - the transaction hash without your wallet address - for analytics. These logs are not tied to your identity. They have no defined retention period. They could be deleted on any server update. Never assume a non-custodial platform will keep your records for you.

Is a screenshot of a swap confirmation enough proof for an accountant is not a simple yes or no. A screenshot is evidence of what a screen showed at a moment. It is not a verified record. An accountant will want a transaction hash and a block explorer link. The screenshot helps establish context - which platform, which pool. The hash provides the auditable proof. If your screenshot includes the hash, it is useful. If it shows only dollar values and glossy interface, it is decoration. Take the screenshot. Always also save the hash separately.

How do I export a swap history from a wallet that only shows token balances is a common frustration. The wallet tracks your tokens. It does not always expose transaction history in a downloadable format. The solution is to use the block explorer. Connect your wallet address to an Arbitrum block explorer. That tool can export a CSV of all transactions. Filter by contract interactions. That gives you every swap. The file will include timestamps, hashes, and token transfers. It will not include the exchange's interface details. Combine that CSV with your screenshots for a complete record.

One more thing cannot be undone: if you send tokens to the wrong address, no swap contract, no support ticket, no appeals process can reverse it. The transaction is final. Check every address before you approve. The same finality applies to approvals that grant too much spending permission. A malicious contract could drain your tokens using an excessive approval. Only approve the exact amount you intend to swap.

Save the hash. Save the screengrab. Save the block explorer link. Do it before you navigate away. The site will not remind you. Your tax filing next year will thank you.