When a Trading Platform Connects to Binance Link, Who Controls Your Account and Funds?

Binance

07 October 2026

For trading platforms connected to Binance Link, final control over accounts and funds rests with Binance, but the daily management of API keys is the responsibility of the platform you connected to. This is the core dividing line for understanding who manages what.

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What Link Actually Connects

Binance Link is Binance's B2B2C solution for enterprise clients, mainly serving exchanges, wallets, brokers, and fintech applications. These platforms do not need to build their own matching engines and liquidity pools. Instead, they route orders to Binance via API, allowing users to place orders on their own platform while actual execution happens on Binance's order book.

The interface, charts, and order entry points users see on the connected platform are all designed and operated by that platform. But every order is ultimately executed within Binance's account system.

Whose Account Is It?

When you register and trade on a platform connected to Binance Link, the platform creates a sub-account for you on Binance. This sub-account sits under the platform's main account (Exchange Link account).

Assets in the sub-account are held in custody by Binance. The platform accesses your sub-account through API keys to place orders on your behalf, but it does not directly "hold" your coins. Legally, the custodian of the assets is Binance.

There is a common point of confusion in practice: you do not establish a direct user relationship with Binance. Binance's official announcements clearly state that it only communicates with the Exchange Link account holder (the connected platform) and does not communicate with sub-account users. Your customer service channel is that platform, not Binance.

Who Manages the API Keys?

This is the clearest part of the responsibility division. Binance provides the user's API keys to the connected platform so the platform can operate various trading functions.

The platform bears full responsibility for API key security. The Link and Trade terms state it directly: the platform must implement appropriate technical and organizational security measures to prevent key loss, theft, or unauthorized access; the platform is responsible for any trading activity that occurs through those keys.

Binance assumes no liability for losses caused by key leakage or misuse. In other words, if the platform's security vulnerability leads to misuse of your API keys, the party you hold accountable is the platform, not Binance.

Where Compliance and Freezing Risks Fall

Starting in March 2024, Binance enforced mandatory KYC requirements for Link sub-accounts. Connected platforms must submit detailed information on behalf of sub-account users through the Link-KYC module, including source of funds, source of wealth, and proof of address, and when necessary, a politically exposed person declaration.

If KYC information is incomplete, the sub-account will be restricted: no new positions can be opened, existing spot orders will be canceled, and margin trading will be limited. Binance also clearly states that under certain circumstances, funds in sub-accounts may be frozen. These "certain circumstances" include legal and compliance reasons, and Binance sometimes cannot even provide detailed explanations to the platform or the user.

The connected platform's level of cooperation also affects your account. If the platform is "unreachable, unresponsive, or uncooperative," Binance may downgrade its Exchange Link account to a corporate account, and unused sub-accounts will be deleted.

Practical Takeaways You Need to Know

For you, this means two things.

First, your assets are not in your own on-chain wallet. The balance you see on the connected platform is the balance in your Binance sub-account. If the platform collapses or runs away, your coins will not disappear with it, but they will be frozen within Binance's sub-account system. The path to unfreezing depends on how Binance and the platform handle the situation.

Second, the platform's operational capability and compliance level directly affect your account security. If the platform submits incomplete KYC information or fails to cooperate with Binance's compliance requirements, your sub-account may be restricted from trading or frozen. When choosing a platform connected to Binance Link, whether it operates properly within Binance's compliance system is more important to confirm first than the "deep liquidity" it advertises.