Know what the field is for
EIP-155 introduces a chain ID into transaction signing to help distinguish transactions intended for different Ethereum-style chains. Its rationale is to avoid a transaction intended for one chain also working on another. It is a protocol protection, not a business identity check.
Do not infer the chain from the address alone
A familiar address format does not show where the intended transfer will happen. Check the network named by the wallet and the recipient’s verified payment instructions before signing. Do not use the historical list in an old proposal as a complete list of currently supported networks.
Keep the address check in its scope
coinscammercheck provides an address-only beta lookup and says automatic selection uses format rather than proof of chain activity. A correctly chosen chain and an absence of detected risk still do not establish that the payee or the proposed transaction is safe.
Sources and check date
Sources checked on 24 October 2026. This is an independent practical guide, not a completed customer transaction.
https://coinscammercheck.supermankorea.xyz/
https://eips.ethereum.org/EIPS/eip-155