# ERC-3643

ERC-3643 is an Ethereum token standard for permissioned tokens: every transfer is validated against on-chain identities and compliance rules before it executes. Built for regulated assets, it lets issuers enforce eligibility, jurisdiction, and holding rules directly in the token contract.

## Identity-bound transfers in practice

ERC-3643 pairs the token with an on-chain identity registry: investors are verified once, and the contract checks eligibility at every transfer, making non-compliant transfers technically impossible rather than merely prohibited.

Taurus-CAPITAL issues and services ERC-3643 tokens alongside CMTAT and ERC-1400, with contract administration under HSM-secured, quorum-governed signing.

FAQ:

- When does ERC-3643 beat ERC-1400? When continuous, identity-verified compliance at transfer time is the core requirement, for example distribution to verified investors across jurisdictions. ERC-1400 focuses on partitioned securities mechanics; many issuers evaluate both per instrument.

Related: https://www.taurushq.com/glossary/token-standard/ https://www.taurushq.com/glossary/erc-1400/ https://www.taurushq.com/capital/

Learn more: https://www.taurushq.com/glossary/erc-3643/