Exchanges, Stablecoin Issuers and Authorities Can Restrict Crypto in Three Ways

Crypto holders can lose access through an exchange account restriction, a stablecoin address block or law enforcement efforts to seize crypto or reach wallet keys, with each route working differently.

On a centralized exchange, the platform holds the keys used to move customers’ crypto and controls withdrawals from hosted accounts. Coinbase, for example, controls the relevant private keys and may use shared blockchain addresses. It can suspend account activity or block withdrawals without changing the blockchain’s transaction history. Authorities can also seek crypto held by an exchange through legal process directed at the custodian.

Some stablecoins add another control point: the issuer. In limited circumstances, Circle may prevent a listed address from sending or receiving USDC or EURC. Transfers involving a blocked address may fail, leaving the associated tokens inaccessible while the restriction is active. A block does not reverse a completed transfer and may be lifted if the relevant legal obligation ends or a security issue is resolved.

Tether’s terms reserve the right to freeze its tokens and blacklist addresses that hold them. The mechanics can vary by token and supported blockchain, and the restrictions may affect tokens held in a self-custody wallet.

Bitcoin (BTC) has no issuing company that can blacklist addresses. Its network validates transactions using signatures tied to private keys. Authorities can still seek crypto held by a custodian or pursue devices, private keys or recovery phrases used to control a self-custody wallet. Warrants can target locally held key material or be served on third-party custodians.

In the 2021 Colonial Pipeline ransomware case, the U.S. Department of Justice seized 63.7 BTC, then valued at about $2.3 million. The FBI held the private key for the address containing the funds. Then-Deputy Attorney General Lisa O. Monaco said, “Following the money remains one of the most basic, yet powerful tools we have.”

Issuer blocks and asset recovery are separate outcomes. From January through August 2026, issuer blacklists yielded no recoveries in 60 major onchain exploits; other interventions accounted for nearly all assets frozen or returned. The earlier issuer-blacklist review covers those recovery figures.