Token standard
ERC-3643 is a format for regulated securities. Only verified investors can hold the security, your offering's rules are checked before every transfer, and authorised agents can act when something goes wrong. It is the standard behind every digital security issued on the Asset Tokenization platform.
ERC-3643 grew out of T-REX, short for Token for Regulated EXchanges, a suite of programs designed for issuing regulated securities as tokens. A token is a digital record of who owns a unit of something. It lives on a blockchain, a shared database kept in sync by many independent computers, so the record cannot be quietly rewritten.
ERC-3643 became a final Ethereum standard in 2023, through the public process where Ethereum standards are agreed. It is supported by the ERC3643 Association, an independent group of firms that use and maintain it. Industry-wide, more than $32B of real-world assets had been tokenized on ERC-3643 by 2025.
It is permissioned: unlike ERC-20, where anyone can hold units, only accounts linked to a verified investor can hold an ERC-3643 security. It still works like ERC-20 for balances and transfers, so common tools can read it.
How it works
The rules live inside the security, written as smart contracts: small programs on the blockchain that run exactly as written.
Each investor has an identity record called ONCHAINID. After the issuer's KYC provider verifies the person, a trusted party attaches a signed confirmation to that record, for example "identity verified" or "resident in an eligible country". Personal documents stay with the provider; only the confirmation is linked.
The rules for your offering are separate building blocks: which countries may hold, how many investors are allowed, maximum holding per investor, lock-up periods. Before any transfer, every active rule is checked. If one says no, the transfer does not happen.
Authorised agents appointed by the issuer can freeze a holding, pause the security, carry out a forced transfer where the law or a court requires it, and restore a holding to an investor who has lost access.
An account is controlled from a wallet, the app or device holding the private key that proves control. Keys get lost. With open standards, a lost key usually means a lost holding. ERC-3643 includes a defined recovery step.
They explain that they can no longer reach their account.
The issuer, through its KYC provider, confirms this is the same verified person linked to the holding.
The investor sets up a new account, and it is linked to the same identity record.
An authorised agent moves the full holding from the lost account to the new one. The old account can no longer be used for that security, and the investor register stays correct.
Asset owners ask us the same things in every first call. Who can end up owning part of my asset? What if the rules change? What if an investor loses access or passes away? ERC-3643 answers these inside the security itself, rather than in spreadsheets and emails next to it.
It is also shared ground. Because it is a final standard used across the industry, counsel, auditors, custodians and regulated trading venues can review a known format instead of custom code. Rules can be adjusted by switching compliance modules on or off, without re-issuing the security. That matters, because rules added too late are one of the most common reasons tokenization projects stall.
The platform uses the unmodified T-REX reference suite, independently audited by Hacken in 2023. The core code is not changed. What changes per offering is the configuration of rules, which you set in the platform's rules engine with your counsel.
The platform has run ERC-3643 securities in live regulated offerings since 2024, one of the first ERC-3643 deployments in Europe, on the Polygon network, a public network compatible with Ethereum and designed for low transaction costs. Investors verified their identity before they could hold a single unit, and the offering's rules were checked on every transfer. See the track record.
You set who may invest and hold, from where and in what amounts, in the platform's rules engine, and those rules are built into the security. Investors register, verify and see holdings in your portal under your own domain.
No regulator approves a token standard. Regulators assess offerings and the people behind them. ERC-3643 is designed to support your compliance obligations by enforcing the rules you and your counsel set.
With the issuer's KYC provider. The identity record carries signed confirmations, such as "verified", not passports or addresses.
Yes, within what your offering documents allow. Compliance modules can be added, removed or adjusted without re-issuing the security or re-onboarding investors.
No. ERC-3643 runs on Ethereum and on networks compatible with it. The platform's live offerings run on Polygon; the network for your offering is chosen during structuring.
A portal on your domain where they register, verify their identity, sign, pay, and see their holdings and documents. See the platform.
The live offerings referred to on this page were issued under their issuer's own approvals and are shown to illustrate capability, not as an offer. For other issuers, Asset Tokenization is a technology and advisory provider only. This page is general information, not legal, tax or investment advice.
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