Unsupported asset

Every exchange publishes a list of assets it will trade and custody, and anything outside it is unsupported there, including bitcoin at a venue that never listed it. Bitstamp's US terms, last updated 23 July 2026, disclaim liability for any unsupported asset sent to a wallet on your account. Check the list before you deposit, because the mistake is usually irreversible and nobody is obliged to undo it.

How it works

Support for an asset is fixed by a contract rather than by a blockchain, so the operator's terms, not the network, decide what your balance is allowed to contain.

Bitstamp USA's Terms of Use define a Digital Asset as "only those particular digital assets listed as available to trade or custody in your Bitstamp Account", then add that services and supported assets may vary by jurisdiction. Two customers of one company can therefore face different lists, and Bitstamp publishes separate terms for its US, European and Singapore entities.

Clause 10.3 of that document says the operator "assumes no responsibility" for any attempt to use your hosted wallet with an asset it does not support. If support ends and you have not sold or moved the asset off the platform first, the balance may be removed and credited back as the equivalent market value in a supported asset or in fiat, minus transaction costs.

Two neighbouring clauses then run two different clocks. Clause 14.3 promises commercially reasonable efforts to warn you at least 30 days before support for transfer or storage ends, and says assets left behind may be lost. Clause 14.4 allows removal from the platform "with immediate effect for any reason or no reason whatsoever", ending trading, balances, deposits and withdrawals in that asset, cancelling outstanding instructions, and giving you a reasonable period to move it out. Notice is a courtesy on the first clock and absent from the second.

Where you see it

Unsupported assets surface in three ordinary places: a deposit screen, a delisting email, and the recovery small print nobody reads until they need it.

Deposits are the expensive one. Bitstamp's risk disclosures say assets sent to an address "intended to be used for a different type" of asset may be lost, and that the company "may try, but is not obligated to" recover them. Recovery is a chargeable investigation, covers only transactions from the previous 30 days, and "will not attempt to recover transactions with the value below $10,000.00". Bitstamp Europe S.A. sets the same 10,000 floor in its own wording. Most mistaken deposits are worth a fraction of that, which is the honest answer to whether support can help.

Delisting reaches you through automation too. The recurring buy clause reserves the right to cancel a standing buy or sell when an asset is delisted, with notice by email. Bitstamp Asia SG points customers at a published listing and governance policy covering how assets are evaluated, reviewed, suspended or dropped.

This site holds 63 exchange records and 6 of them are bitcoin only, which is the cleanest form of the rule: at River, Strike, Swan Bitcoin or Relai every asset except bitcoin is unsupported by design. At the other 57 the trouble is a token somebody sent you, a coin a venue quietly dropped, or a forked variant sitting in the same account.

Unsupported asset vs altcoin

An altcoin is a class of asset, while an unsupported asset is a relationship between one asset and one platform on one day.

Any coin can be both, either or neither. Bitcoin is an unsupported asset at a venue that lists only tokens, and a well-known altcoin can be supported everywhere you look. Delisting is not a verdict on quality either: clause 14.4 expressly covers removal demanded by a law, a court or a regulator, and no reason is owed to you in any case. The useful question is whether the asset is on this venue's list today, not whether it deserves to be.