Match a Polygon Bridge transfer by linking its source debit to the destination credit by token, amount, wallet, and bridge record, once both sides meet your accounting policy’s confirmation threshold. Treat it as one movement of principal across two ledgers, with a separate transaction record for each chain and gas recorded as a cost.
- Keep both transaction hashes; a successful transaction on one chain does not prove the destination credit is complete.
- Match the same asset by contract address and decimals, not ticker alone.
- For regular transfers, reconcile expected and actual amounts before closing the period.
For a team moving funds between Ethereum and Polygon PoS, Polygon Bridge is a concrete example of a route that creates records on both networks. The Polygon bridge fees article can help when you set expected costs; record network gas separately from the amount being transferred.
Build one record from both chain transactions
A complete reconciliation record identifies the transfer on both chains and the business purpose it serves. Store the source and destination transaction hashes, the sending and receiving addresses, the token contract on each network, the amount, timestamps, and each transaction’s status.
Use the contract address together with the network as the asset identifier: a USDC ticker by itself is not enough to distinguish tokens. Preserve the raw token amount or its smallest units where possible, then display the human-readable amount using that token’s decimals. This prevents rounding or similarly named assets from obscuring a mismatch.
For recurring treasury runs, add an internal transfer ID, approver, cost centre, and intended settlement window. Those fields connect the on-chain evidence to the payment instruction or treasury journal entry; they are especially useful when multiple transfers use the same wallet on the same day.
Follow the bridge’s two-sided accounting trail
A Polygon Bridge deposit starts with an Ethereum transaction that locks the asset in the bridge mechanism, followed by a Polygon-side transaction that makes the corresponding asset available. Reconcile the Ethereum event to the Polygon credit using the bridge’s message or event reference when available, alongside matching token and amount.
A withdrawal follows a different path: the Polygon-side asset is burned, then the withdrawal is included in a checkpoint and completed on Ethereum so the corresponding asset can be released there. That means the Polygon debit and Ethereum credit may appear at different times, and the burn alone is not evidence that the Ethereum-side transfer has finished.
For each direction, keep the transaction hash for every on-chain step rather than forcing the transfer into one hash field. If the bridge exposes an event or message identifier, retain it as the join key; transaction hashes show where each step happened, while the shared reference connects those steps.
Keep pending transfers open until both sides reconcile
A transfer is ready to close when the source step is confirmed, the destination step is complete under your policy, and the principal matches after accounting for any documented bridge-level deduction. Gas is a separate expense: the sending chain’s fee does not reduce the principal on the other chain in the same way a token deduction would.
For example, suppose an illustrative transfer sends 1,000 USDC from Ethereum to Polygon PoS. Treasury should match the 1,000-unit source principal to the destination-side USDC credit, then book Ethereum gas as its own expense. If the destination record is still pending, leave the transfer in a bridge-clearing account rather than marking it settled; clear that balance when the credit arrives.
Use a defined aging rule for open items. If a transfer remains unmatched beyond its expected window, compare the source receipt, destination activity, token contracts, and bridge reference before escalating it internally. A delayed second leg and a failed source transaction require different accounting treatments.
Use exceptions to improve the next transfer run
Common exceptions include a source transaction that was replaced or dropped, a destination credit that has not completed, and a mismatch caused by the wrong token contract or recipient address. Keep each item open with its last verified chain status and owner; do not create a second transfer simply because the first one is not yet visible on the destination.
Polygon Bridge transfers fit more easily into a repeatable close when the team captures both chain records at initiation and checks the destination leg before settlement. Start with one recent transfer: collect its source and destination evidence, match the principal, record gas separately, and use any gap you find to refine the fields in your treasury record.